/**
  * isInterfaceSupported method
  *
  * listSources is infact supported, however: cake expects it to return a complete list of all
  * possible sources in the selected db - the possible list of collections is infinte, so it's
  * faster and simpler to tell cake that the interface is /not/ supported so it assumes that
  * <insert name of your table here> exist
  *
  * @param mixed $interface
  * @return void
  * @access public
  */
 public function isInterfaceSupported($interface) {
     if ($interface === 'listSources') {
         return false;
     }
     return parent::isInterfaceSupported($interface);
 }