diff --git a/CGLayout.xcodeproj/project.pbxproj b/CGLayout.xcodeproj/project.pbxproj
index 2611382..f0cc73b 100644
--- a/CGLayout.xcodeproj/project.pbxproj
+++ b/CGLayout.xcodeproj/project.pbxproj
@@ -7,7 +7,7 @@
 	objects = {
 
 /* Begin PBXAggregateTarget section */
-		CGLayout::CGLayoutPackageTests::ProductTarget /* CGLayoutPackageTests */ = {
+		"CGLayout::CGLayoutPackageTests::ProductTarget" /* CGLayoutPackageTests */ = {
 			isa = PBXAggregateTarget;
 			buildConfigurationList = OBJ_61 /* Build configuration list for PBXAggregateTarget "CGLayoutPackageTests" */;
 			buildPhases = (
@@ -39,7 +39,7 @@
 		OBJ_70 /* CGLayoutTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = OBJ_25 /* CGLayoutTests.swift */; };
 		OBJ_71 /* Tests.swift in Sources */ = {isa = PBXBuildFile; fileRef = OBJ_26 /* Tests.swift */; };
 		OBJ_72 /* support_linux.tests.swift in Sources */ = {isa = PBXBuildFile; fileRef = OBJ_27 /* support_linux.tests.swift */; };
-		OBJ_74 /* CGLayout.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = CGLayout::CGLayout::Product /* CGLayout.framework */; };
+		OBJ_74 /* CGLayout.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = "CGLayout::CGLayout::Product" /* CGLayout.framework */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXContainerItemProxy section */
@@ -60,8 +60,8 @@
 /* End PBXContainerItemProxy section */
 
 /* Begin PBXFileReference section */
-		CGLayout::CGLayout::Product /* CGLayout.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; path = CGLayout.framework; sourceTree = BUILT_PRODUCTS_DIR; };
-		CGLayout::CGLayoutTests::Product /* CGLayoutTests.xctest */ = {isa = PBXFileReference; lastKnownFileType = file; path = CGLayoutTests.xctest; sourceTree = BUILT_PRODUCTS_DIR; };
+		"CGLayout::CGLayout::Product" /* CGLayout.framework */ = {isa = PBXFileReference; explicitFileType = wrapper.framework; path = CGLayout.framework; sourceTree = BUILT_PRODUCTS_DIR; };
+		"CGLayout::CGLayoutTests::Product" /* CGLayoutTests.xctest */ = {isa = PBXFileReference; lastKnownFileType = file; path = CGLayoutTests.xctest; sourceTree = BUILT_PRODUCTS_DIR; };
 		OBJ_10 /* coordinate.cglayout.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = coordinate.cglayout.swift; sourceTree = "<group>"; };
 		OBJ_11 /* core.cglayout.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = core.cglayout.swift; sourceTree = "<group>"; };
 		OBJ_12 /* deprecated.cglayout.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = deprecated.cglayout.swift; sourceTree = "<group>"; };
@@ -142,8 +142,8 @@
 		OBJ_31 /* Products */ = {
 			isa = PBXGroup;
 			children = (
-				CGLayout::CGLayout::Product /* CGLayout.framework */,
-				CGLayout::CGLayoutTests::Product /* CGLayoutTests.xctest */,
+				"CGLayout::CGLayout::Product" /* CGLayout.framework */,
+				"CGLayout::CGLayoutTests::Product" /* CGLayoutTests.xctest */,
 			);
 			name = Products;
 			sourceTree = BUILT_PRODUCTS_DIR;
@@ -159,7 +159,6 @@
 				OBJ_30 /* Resources */,
 				OBJ_31 /* Products */,
 			);
-			name = "";
 			sourceTree = "<group>";
 		};
 		OBJ_7 /* Sources */ = {
@@ -186,7 +185,7 @@
 /* End PBXGroup section */
 
 /* Begin PBXNativeTarget section */
-		CGLayout::CGLayout /* CGLayout */ = {
+		"CGLayout::CGLayout" /* CGLayout */ = {
 			isa = PBXNativeTarget;
 			buildConfigurationList = OBJ_35 /* Build configuration list for PBXNativeTarget "CGLayout" */;
 			buildPhases = (
@@ -199,10 +198,10 @@
 			);
 			name = CGLayout;
 			productName = CGLayout;
-			productReference = CGLayout::CGLayout::Product /* CGLayout.framework */;
+			productReference = "CGLayout::CGLayout::Product" /* CGLayout.framework */;
 			productType = "com.apple.product-type.framework";
 		};
-		CGLayout::CGLayoutTests /* CGLayoutTests */ = {
+		"CGLayout::CGLayoutTests" /* CGLayoutTests */ = {
 			isa = PBXNativeTarget;
 			buildConfigurationList = OBJ_66 /* Build configuration list for PBXNativeTarget "CGLayoutTests" */;
 			buildPhases = (
@@ -216,10 +215,10 @@
 			);
 			name = CGLayoutTests;
 			productName = CGLayoutTests;
-			productReference = CGLayout::CGLayoutTests::Product /* CGLayoutTests.xctest */;
+			productReference = "CGLayout::CGLayoutTests::Product" /* CGLayoutTests.xctest */;
 			productType = "com.apple.product-type.bundle.unit-test";
 		};
-		CGLayout::SwiftPMPackageDescription /* CGLayoutPackageDescription */ = {
+		"CGLayout::SwiftPMPackageDescription" /* CGLayoutPackageDescription */ = {
 			isa = PBXNativeTarget;
 			buildConfigurationList = OBJ_55 /* Build configuration list for PBXNativeTarget "CGLayoutPackageDescription" */;
 			buildPhases = (
@@ -254,10 +253,10 @@
 			projectDirPath = "";
 			projectRoot = "";
 			targets = (
-				CGLayout::CGLayout /* CGLayout */,
-				CGLayout::SwiftPMPackageDescription /* CGLayoutPackageDescription */,
-				CGLayout::CGLayoutPackageTests::ProductTarget /* CGLayoutPackageTests */,
-				CGLayout::CGLayoutTests /* CGLayoutTests */,
+				"CGLayout::CGLayout" /* CGLayout */,
+				"CGLayout::SwiftPMPackageDescription" /* CGLayoutPackageDescription */,
+				"CGLayout::CGLayoutPackageTests::ProductTarget" /* CGLayoutPackageTests */,
+				"CGLayout::CGLayoutTests" /* CGLayoutTests */,
 			);
 		};
 /* End PBXProject section */
@@ -307,12 +306,12 @@
 /* Begin PBXTargetDependency section */
 		OBJ_64 /* PBXTargetDependency */ = {
 			isa = PBXTargetDependency;
-			target = CGLayout::CGLayoutTests /* CGLayoutTests */;
+			target = "CGLayout::CGLayoutTests" /* CGLayoutTests */;
 			targetProxy = A43DA79D20E6CEB400EDFF46 /* PBXContainerItemProxy */;
 		};
 		OBJ_75 /* PBXTargetDependency */ = {
 			isa = PBXTargetDependency;
-			target = CGLayout::CGLayout /* CGLayout */;
+			target = "CGLayout::CGLayout" /* CGLayout */;
 			targetProxy = A43DA79C20E6CEB300EDFF46 /* PBXContainerItemProxy */;
 		};
 /* End PBXTargetDependency section */
diff --git a/CGLayout.xcodeproj/xcshareddata/xcschemes/CGLayout-Package.xcscheme b/CGLayout.xcodeproj/xcshareddata/xcschemes/CGLayout-Package.xcscheme
index 3b6b650..e68900c 100644
--- a/CGLayout.xcodeproj/xcshareddata/xcschemes/CGLayout-Package.xcscheme
+++ b/CGLayout.xcodeproj/xcshareddata/xcschemes/CGLayout-Package.xcscheme
@@ -43,7 +43,7 @@
       </AdditionalOptions>
    </TestAction>
    <LaunchAction
-      buildConfiguration = "Debug"
+      buildConfiguration = "Release"
       selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
       selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
       launchStyle = "0"
diff --git a/Example/CGLayout.xcodeproj/project.pbxproj b/Example/CGLayout.xcodeproj/project.pbxproj
index f2a8b09..0a49115 100644
--- a/Example/CGLayout.xcodeproj/project.pbxproj
+++ b/Example/CGLayout.xcodeproj/project.pbxproj
@@ -13,7 +13,6 @@
 		607FACDB1AFB9204008FA782 /* Main.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 607FACD91AFB9204008FA782 /* Main.storyboard */; };
 		607FACDD1AFB9204008FA782 /* Images.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = 607FACDC1AFB9204008FA782 /* Images.xcassets */; };
 		607FACE01AFB9204008FA782 /* LaunchScreen.xib in Resources */ = {isa = PBXBuildFile; fileRef = 607FACDE1AFB9204008FA782 /* LaunchScreen.xib */; };
-		A40485A71F978A1C00DB38E4 /* CONTRIBUTING.md in Sources */ = {isa = PBXBuildFile; fileRef = A40485A61F978A1C00DB38E4 /* CONTRIBUTING.md */; };
 		A4232A181F82D20C00016A8A /* ViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = 607FACD71AFB9204008FA782 /* ViewController.swift */; };
 		A4232A191F82D21100016A8A /* SecondViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = A4579C341F59E86800893AB2 /* SecondViewController.swift */; };
 		A4232A1A1F82D21500016A8A /* SecondViewControllerAutolayout.swift in Sources */ = {isa = PBXBuildFile; fileRef = A43D53961F6FDEE300A92425 /* SecondViewControllerAutolayout.swift */; };
@@ -33,7 +32,6 @@
 		A47A6F271F5F2A3400673999 /* SecondViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = A4579C341F59E86800893AB2 /* SecondViewController.swift */; };
 		A4879D0D1F93A4B400BCBF0E /* ScrollLayoutViewController.swift in Sources */ = {isa = PBXBuildFile; fileRef = A4879D0C1F93A4B400BCBF0E /* ScrollLayoutViewController.swift */; };
 		A4B96E6E20D6D9CF003C7803 /* Tests.swift in Sources */ = {isa = PBXBuildFile; fileRef = A4B96E6C20D6D9CF003C7803 /* Tests.swift */; };
-		A4DE587E20E65178002B7678 /* support_linux.tests.swift in Sources */ = {isa = PBXBuildFile; fileRef = A4B96E6B20D6D9CF003C7803 /* support_linux.tests.swift */; };
 		A4DECF99206FFA76006933C4 /* CGLayoutTests.swift in Sources */ = {isa = PBXBuildFile; fileRef = A4DECF97206FFA76006933C4 /* CGLayoutTests.swift */; };
 		AA207DB93A95FD0B83A04761 /* Pods_CGLayout_Tests.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 18AF282E152D179C9353E356 /* Pods_CGLayout_Tests.framework */; };
 		B635776618CF077E9FE44524 /* Pods_CGLayout_tvOS.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 229950F7B0B7736994BF5766 /* Pods_CGLayout_tvOS.framework */; };
@@ -798,7 +796,6 @@
 				A4579C351F59E86800893AB2 /* SecondViewController.swift in Sources */,
 				A43D53971F6FDEE300A92425 /* SecondViewControllerAutolayout.swift in Sources */,
 				A42E170E20B2FE1100E1985C /* LayoutViewController.swift in Sources */,
-				A40485A71F978A1C00DB38E4 /* CONTRIBUTING.md in Sources */,
 				A4879D0D1F93A4B400BCBF0E /* ScrollLayoutViewController.swift in Sources */,
 				607FACD81AFB9204008FA782 /* ViewController.swift in Sources */,
 				A44646BC1F74132A009601DA /* TableViewController.swift in Sources */,
@@ -811,7 +808,6 @@
 			buildActionMask = 2147483647;
 			files = (
 				A47A6F271F5F2A3400673999 /* SecondViewController.swift in Sources */,
-				A4DE587E20E65178002B7678 /* support_linux.tests.swift in Sources */,
 				A4B96E6E20D6D9CF003C7803 /* Tests.swift in Sources */,
 				A4DECF99206FFA76006933C4 /* CGLayoutTests.swift in Sources */,
 			);
@@ -941,7 +937,8 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				IPHONEOS_DEPLOYMENT_TARGET = 8.3;
+				IPHONEOS_DEPLOYMENT_TARGET = 9.0;
+				MACOSX_DEPLOYMENT_TARGET = 10.12;
 				MTL_ENABLE_DEBUG_INFO = YES;
 				ONLY_ACTIVE_ARCH = YES;
 				SDKROOT = iphoneos;
@@ -981,7 +978,8 @@
 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
 				GCC_WARN_UNUSED_FUNCTION = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
-				IPHONEOS_DEPLOYMENT_TARGET = 8.3;
+				IPHONEOS_DEPLOYMENT_TARGET = 9.0;
+				MACOSX_DEPLOYMENT_TARGET = 10.12;
 				MTL_ENABLE_DEBUG_INFO = NO;
 				SDKROOT = iphoneos;
 				SWIFT_OPTIMIZATION_LEVEL = "-Owholemodule";
diff --git a/Example/CGLayout.xcodeproj/xcshareddata/xcschemes/CGLayout-Example.xcscheme b/Example/CGLayout.xcodeproj/xcshareddata/xcschemes/CGLayout-Example.xcscheme
deleted file mode 100644
index a402e94..0000000
--- a/Example/CGLayout.xcodeproj/xcshareddata/xcschemes/CGLayout-Example.xcscheme
+++ /dev/null
@@ -1,124 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<Scheme
-   LastUpgradeVersion = "0820"
-   version = "1.3">
-   <BuildAction
-      parallelizeBuildables = "YES"
-      buildImplicitDependencies = "YES">
-      <BuildActionEntries>
-         <BuildActionEntry
-            buildForTesting = "YES"
-            buildForRunning = "YES"
-            buildForProfiling = "YES"
-            buildForArchiving = "YES"
-            buildForAnalyzing = "YES">
-            <BuildableReference
-               BuildableIdentifier = "primary"
-               BlueprintIdentifier = "607FACCF1AFB9204008FA782"
-               BuildableName = "CGLayout_Example.app"
-               BlueprintName = "CGLayout_Example"
-               ReferencedContainer = "container:CGLayout.xcodeproj">
-            </BuildableReference>
-         </BuildActionEntry>
-         <BuildActionEntry
-            buildForTesting = "YES"
-            buildForRunning = "YES"
-            buildForProfiling = "NO"
-            buildForArchiving = "NO"
-            buildForAnalyzing = "YES">
-            <BuildableReference
-               BuildableIdentifier = "primary"
-               BlueprintIdentifier = "607FACE41AFB9204008FA782"
-               BuildableName = "CGLayout_Tests.xctest"
-               BlueprintName = "CGLayout_Tests"
-               ReferencedContainer = "container:CGLayout.xcodeproj">
-            </BuildableReference>
-         </BuildActionEntry>
-      </BuildActionEntries>
-   </BuildAction>
-   <TestAction
-      buildConfiguration = "Debug"
-      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
-      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
-      language = ""
-      shouldUseLaunchSchemeArgsEnv = "YES"
-      codeCoverageEnabled = "YES">
-      <Testables>
-         <TestableReference
-            skipped = "NO">
-            <BuildableReference
-               BuildableIdentifier = "primary"
-               BlueprintIdentifier = "607FACE41AFB9204008FA782"
-               BuildableName = "CGLayout_Tests.xctest"
-               BlueprintName = "CGLayout_Tests"
-               ReferencedContainer = "container:CGLayout.xcodeproj">
-            </BuildableReference>
-         </TestableReference>
-      </Testables>
-      <MacroExpansion>
-         <BuildableReference
-            BuildableIdentifier = "primary"
-            BlueprintIdentifier = "607FACCF1AFB9204008FA782"
-            BuildableName = "CGLayout_Example.app"
-            BlueprintName = "CGLayout_Example"
-            ReferencedContainer = "container:CGLayout.xcodeproj">
-         </BuildableReference>
-      </MacroExpansion>
-      <AdditionalOptions>
-      </AdditionalOptions>
-   </TestAction>
-   <LaunchAction
-      buildConfiguration = "Debug"
-      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
-      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
-      language = ""
-      launchStyle = "0"
-      useCustomWorkingDirectory = "NO"
-      ignoresPersistentStateOnLaunch = "NO"
-      debugDocumentVersioning = "YES"
-      debugServiceExtension = "internal"
-      allowLocationSimulation = "YES">
-      <BuildableProductRunnable
-         runnableDebuggingMode = "0">
-         <BuildableReference
-            BuildableIdentifier = "primary"
-            BlueprintIdentifier = "607FACCF1AFB9204008FA782"
-            BuildableName = "CGLayout_Example.app"
-            BlueprintName = "CGLayout_Example"
-            ReferencedContainer = "container:CGLayout.xcodeproj">
-         </BuildableReference>
-      </BuildableProductRunnable>
-      <CommandLineArguments>
-         <CommandLineArgument
-            argument = "CGL_THROW_ON_WARNING"
-            isEnabled = "YES">
-         </CommandLineArgument>
-      </CommandLineArguments>
-      <AdditionalOptions>
-      </AdditionalOptions>
-   </LaunchAction>
-   <ProfileAction
-      buildConfiguration = "Release"
-      shouldUseLaunchSchemeArgsEnv = "YES"
-      savedToolIdentifier = ""
-      useCustomWorkingDirectory = "NO"
-      debugDocumentVersioning = "YES">
-      <BuildableProductRunnable
-         runnableDebuggingMode = "0">
-         <BuildableReference
-            BuildableIdentifier = "primary"
-            BlueprintIdentifier = "607FACCF1AFB9204008FA782"
-            BuildableName = "CGLayout_Example.app"
-            BlueprintName = "CGLayout_Example"
-            ReferencedContainer = "container:CGLayout.xcodeproj">
-         </BuildableReference>
-      </BuildableProductRunnable>
-   </ProfileAction>
-   <AnalyzeAction
-      buildConfiguration = "Debug">
-   </AnalyzeAction>
-   <ArchiveAction
-      buildConfiguration = "Release"
-      revealArchiveInOrganizer = "YES">
-   </ArchiveAction>
-</Scheme>
diff --git a/Sources/Classes/layoutGuide.cglayout.swift b/Sources/Classes/layoutGuide.cglayout.swift
index 96876db..e68595d 100644
--- a/Sources/Classes/layoutGuide.cglayout.swift
+++ b/Sources/Classes/layoutGuide.cglayout.swift
@@ -181,16 +181,16 @@ public extension LayoutGuide {
 
 /// Base class for any view placeholder that need dynamic position and/or size.
 /// Used UIViewController pattern for loading target view, therefore will be very simply use him.
-open class LayoutPlaceholder<Item: LayoutElement, Super: LayoutElement>: LayoutGuide<Super> {
-    open private(set) lazy var itemLayout: LayoutBlock<Item> = self.element.layoutBlock()
-    fileprivate var _item: Item?
+open class LayoutPlaceholder<Element: LayoutElement, Super: LayoutElement>: LayoutGuide<Super> {
+    open private(set) lazy var itemLayout: LayoutBlock<Element> = self.element.layoutBlock()
+    fileprivate var _element: Element?
 
-    open var element: Item! {
+    open var element: Element! {
         loadElementIfNeeded()
         return elementIfLoaded
     }
-    open var isElementLoaded: Bool { return _item != nil }
-    open var elementIfLoaded: Item? { return _item }
+    open var isElementLoaded: Bool { return _element != nil }
+    open var elementIfLoaded: Element? { return _element }
 
     open func loadElement() {
         // subclass override
@@ -231,7 +231,7 @@ open class LayoutPlaceholder<Item: LayoutElement, Super: LayoutElement>: LayoutG
 /// Used UIViewController pattern for loading target view, therefore will be very simply use him.
 open class LayerPlaceholder<Layer: CALayer>: LayoutPlaceholder<Layer, CALayer> {
     open override func loadElement() {
-        _item = add(Layer.self)
+        _element = add(Layer.self)
     }
 }
 #endif
@@ -259,7 +259,7 @@ open class ViewPlaceholder<View: UIView>: LayoutPlaceholder<View, UIView>, Adjus
     }
 
     open override func loadElement() {
-        _item = load?() ?? add(View.self)
+        _element = load?() ?? add(View.self)
     }
 
     open override func elementDidLoad() {
diff --git a/Tests/CGLayoutTests/support_linux.tests.swift b/Tests/CGLayoutTests/support_linux.tests.swift
index d7cd781..9acd123 100644
--- a/Tests/CGLayoutTests/support_linux.tests.swift
+++ b/Tests/CGLayoutTests/support_linux.tests.swift
@@ -6,11 +6,12 @@ import Cocoa
 import Foundation
 #endif
 
+#if os(Linux)
+
 @testable import CGLayout
 
 /// The container does not know which child is being added,
 /// but the child knows exactly where it is being added
-#if os(Linux)
 
 class ContainerEnterPoint {
     func add(to view: View) {