code: @Override
  	protected void initializeDefaultPreferences(IPreferenceStore store)
  	{
  		store.setDefault(IUml2Constants.PREFER_ASSOCIATIONS_PREFERENCE, true);
  		store.setDefault(IUml2Constants.DISABLE_NESTED_ARTIFACTS_PREFERENCE, true);
  	}
docs: Initializes a preference store with default preference values for this plug-in.