process: add Command::get_kill_on_drop()

tokio/src/process/mod.rs

@@ -981,6 +981,26 @@ impl Command {
 
         async { child?.wait_with_output().await }
     }
+
+    /// Returns the boolean value that was previously set by [`Command::kill_on_drop`].
+    ///
+    /// Note that if you have not previously called [`Command:: kill_on_drop`], the
+    /// default value of `false` will be returned here.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use tokio::process::Command;
+    ///
+    /// let mut cmd = Command::new("echo");
+    /// assert!(!cmd.get_kill_on_drop());
+    ///
+    /// cmd.kill_on_drop(true);
+    /// assert!(cmd.get_kill_on_drop());
+    /// ```
+    pub fn get_kill_on_drop(&self) -> bool {
+        self.kill_on_drop
+    }
 }
 
 impl From<StdCommand> for Command {