rem: QWidget* KMFilterActionRemoveHeader::createParamWidget( QWidget* parent ) const
add: QWidget * KMFilterActionIdentity::createParamWidget( QWidget * parent ) const
context: QWidget* KMFilterActionRemoveHeader::createParamWidget( QWidget* parent ) const{  QComboBox *cb = new QComboBox( TRUE/*editable*/, parent );  cb->setInsertionPolicy( QComboBox::AtBottom );  setParamWidgetValue( cb );  return cb;}