static XmlExpandSelectionAnnotation GetAnnotation(MonoDevelop.Ide.Editor.TextEditor editor, Func <XmlParser> getTreeParser)
{
var result = editor.Annotation <XmlExpandSelectionAnnotation> ();
if (result == null)
{
result = new XmlExpandSelectionAnnotation(editor, getTreeParser());
editor.AddAnnotation(result);
}
return(result);
}