/**
* Returns an array containing, for each field, the arary key used for that
* field in self::$_fields.
*
* @return array
*/
static function &fieldKeys()
{
if (!self::$_fieldKeys) {
self::$_fieldKeys = array('id' => 'id', 'entity_table' => 'entity_table', 'entity_id' => 'entity_id', 'contribution_id' => 'contribution_id', 'price_field_id' => 'price_field_id', 'label' => 'label', 'qty' => 'qty', 'unit_price' => 'unit_price', 'line_total' => 'line_total', 'participant_count' => 'participant_count', 'price_field_value_id' => 'price_field_value_id', 'financial_type_id' => 'financial_type_id', 'deductible_amount' => 'deductible_amount', 'tax_amount' => 'tax_amount');
}
return self::$_fieldKeys;
}
