extension class that returns 'this'

1-usage.scala

textfield.asScala.onEditorAction((_,id,event) => true)

extension.scala

  implicit class ExtensionOfTextView(val base: android.widget.TextView) extends AnyVal {
    def onEditorAction0(fn: => Boolean) =
      base.setOnEditorActionListener(`fn0 to android.widget.TextView$OnEditorActionListener`(() => fn))

    def onEditorAction(fn: (android.widget.TextView, Int, android.view.KeyEvent) => Boolean) =
      base.setOnEditorActionListener(`fn3 to android.widget.TextView$OnEditorActionListener`(fn))
    def asScala = this
  }

gistfile1.txt

     126: getstatic     #202                // Field com/hanhuy/android/extensions/package$ExtensionOfTextView$.MODULE$:Lcom/hanhuy/android/extensions/package$ExtensionOfTextView$;
     129: getstatic     #202                // Field com/hanhuy/android/extensions/package$ExtensionOfTextView$.MODULE$:Lcom/hanhuy/android/extensions/package$ExtensionOfTextView$;
     132: getstatic     #207                // Field com/hanhuy/android/extensions/package$.MODULE$:Lcom/hanhuy/android/extensions/package$;
     135: aload_0
     136: invokevirtual #131                // Method textfield:()Lcom/rengwuxian/materialedittext/MaterialEditText;
     139: invokevirtual #211                // Method com/hanhuy/android/extensions/package$.ExtensionOfTextView:(Landroid/widget/TextView;)Landroid/widget/TextView;
     142: invokevirtual #214                // Method com/hanhuy/android/extensions/package$ExtensionOfTextView$.asScala$extension:(Landroid/widget/TextView;)Landroid/widget/TextView;
     145: new           #216                // class com/hanhuy/android/keepshare/StandardEditView$$anonfun$13
     148: dup
     149: aload_0
     150: invokespecial #219                // Method com/hanhuy/android/keepshare/StandardEditView$$anonfun$13."<init>":(Lcom/hanhuy/android/keepshare/StandardEditView;)V
     153: invokevirtual #223                // Method com/hanhuy/android/extensions/package$ExtensionOfTextView$.onEditorAction$extension:(Landroid/widget/TextView;Lscala/Function3;)V

without-asScala

     126: getstatic     #202                // Field com/hanhuy/android/extensions/package$ExtensionOfTextView$.MODULE$:Lcom/hanhuy/android/extensions/package$ExtensionOfTextView$;
     129: getstatic     #207                // Field com/hanhuy/android/extensions/package$.MODULE$:Lcom/hanhuy/android/extensions/package$;
     132: aload_0
     133: invokevirtual #131                // Method textfield:()Lcom/rengwuxian/materialedittext/MaterialEditText;
     136: invokevirtual #211                // Method com/hanhuy/android/extensions/package$.ExtensionOfTextView:(Landroid/widget/TextView;)Landroid/widget/TextView;
     139: new           #213                // class com/hanhuy/android/keepshare/StandardEditView$$anonfun$2
     142: dup
     143: aload_0
     144: invokespecial #216                // Method com/hanhuy/android/keepshare/StandardEditView$$anonfun$2."<init>":(Lcom/hanhuy/android/keepshare/StandardEditView;)V
     147: invokevirtual #220                // Method com/hanhuy/android/extensions/package$ExtensionOfTextView$.onEditorAction0$extension:(Landroid/widget/TextView;Lscala/Function0;)V