SpecialElement
data class SpecialElement(val content: XmlContent, val sourceRange: SourceRange? = null) : XmlLocatable, Keyboard3Ast.Keyboard3Element.Child, Keyboard3Ast.DisplaysElement.Child, Keyboard3Ast.KeysElement.Child, Keyboard3Ast.FlicksElement.Child, Keyboard3Ast.FlickElement.Child, Keyboard3Ast.FormsElement.Child, Keyboard3Ast.FormElement.Child, Keyboard3Ast.LayersElement.Child, Keyboard3Ast.LayerElement.Child, Keyboard3Ast.VariablesElement.Child, Keyboard3Ast.TransformsElement.Child, Keyboard3Ast.TransformGroupElement.Child(source)