Added spotless rule to refuse wildcard imports

build.gradle

@@ -122,6 +122,13 @@ spotless {
         //palantirJavaFormat() //not optimal, because unnecessary line breaks in head of for loop and corrupts editor folds
         //prettier() //needs npm installed, unsuitable...
         //clangFormat() //also needs an installation...
+        custom 'Refuse wildcard imports', {
+            // Wildcard imports can't be resolved by spotless itself.
+            // This will require the developer themselves to adhere to best practices.
+            if (it =~ /\nimport .*\*;/) {
+                throw new AssertionError("Do not use wildcard imports. 'spotlessApply' cannot resolve this issue.")
+            }
+        }
     }
 }