@Override
		protected List<Completion> getCompletionsImpl( JTextComponent comp ) {
			updateCompletions( comp );
			return super.getCompletionsImpl( comp );
		}
A completion provider for keys, which always uses all known/predefined keys.
flatlaf-theme-editor/src/main/java/com/formdev/flatlaf/themeeditor/FlatCompletionProvider.java