/**
* Get Instructors
*
* Obtain a list of instructors for use in limiting the reserves list.
*
* @return array An associative array with key = ID, value = name.
* @access public
*/
public function getInstructors()
{
// Graceful degradation -- return empty list if no method supported.
return method_exists($this->driver, 'getInstructors') ? $this->driver->getInstructors() : array();
}