/**
  * Override method: default value option has to be handled differently for enum data type
  * @see tine20/Setup/Backend/Setup_Backend_Abstract#_addDeclarationDefaultValue($_buffer, $_field)
  */
 protected function _addDeclarationDefaultValue(array $_buffer, Setup_Backend_Schema_Field_Abstract $_field)
 {
     if ($_field->type == 'enum') {
         return $_buffer;
     }
     return parent::_addDeclarationDefaultValue($_buffer, $_field);
 }