protected function _getKeyMapping()
{
return array('frontend_input_renderer' => 'input_renderer', 'is_global' => 'global', 'is_visible' => 'visible', 'is_searchable' => 'searchable', 'is_filterable' => 'filterable', 'is_comparable' => 'comparable', 'is_visible_on_front' => 'visible_on_front', 'is_wysiwyg_enabled' => 'wysiwyg_enabled', 'is_visible_in_advanced_search' => 'visible_in_advanced_search', 'is_filterable_in_search' => 'filterable_in_search', 'is_used_for_promo_rules' => 'used_for_promo_rules', 'backend_model' => 'backend', 'backend_type' => 'type', 'backend_table' => 'table', 'frontend_model' => 'frontend', 'frontend_input' => 'input', 'frontend_label' => 'label', 'source_model' => 'source', 'is_required' => 'required', 'is_user_defined' => 'user_defined', 'default_value' => 'default', 'is_unique' => 'unique');
}