/**
  * Gets the actual table for the table alias
  * @param string $table_alias eg Event, Event_Meta, Registration, Transaction, but maybe
  * a table alias with a model chain prefix, like 'Venue__Event_Venue___Event_Meta'. Either one works
  * @return EE_Table_Base
  */
 function get_table_for_alias($table_alias)
 {
     $table_alias_sans_model_relation_chain_prefix = EE_Model_Parser::remove_table_alias_model_relation_chain_prefix($table_alias);
     return $this->_tables[$table_alias_sans_model_relation_chain_prefix]->get_table_name();
 }