@Override
		public List<Completion> getCompletionsAt( JTextComponent comp, Point pt ) {
			updateCompletions( comp );
			return super.getCompletionsAt( comp, pt );
		}
A completion provider for references within values. Only keys defined
in current properties file and in base properties files are used.
flatlaf-theme-editor/src/main/java/com/formdev/flatlaf/themeeditor/FlatCompletionProvider.java