returningAttributesCombo.setLayoutData( gd );
// Content assist
contentAssistProcessor = new ReturningAttributesContentAssistProcessor( new String[0] );
DialogContentAssistant raca = new DialogContentAssistant();
raca.enableAutoInsert( true );
raca.enableAutoActivation( true );
raca.setAutoActivationDelay( 500 );
raca.setContentAssistProcessor( contentAssistProcessor, IDocument.DEFAULT_CONTENT_TYPE );
raca.install( returningAttributesCombo );