svoid installCompletionProvider(DefaultCompletionProvider completionProvider, RSyntaxTextArea textArea) swing {
  if (completionProvider == null || textArea == null) ret;
  
  completionProvider.setAutoActivationRules(true, " ");
  autoComplete = new AutoCompletion(completionProvider);
  autoComplete.setAutoCompleteSingleChoices(false);
  autoComplete.setAutoActivationEnabled(true);
  autoComplete.setAutoActivationDelay(2000);
  autoComplete.install(textArea());
}