models/Credential.php
public function callHandler($handler_id, $name, array $arguments = array())
    {
        return Handler::call($this->getHandlers(), $handler_id, $name, $arguments);
    }
public function callHandler($handler_id, $name, array $arguments = array())
    {
        return Handler::call($this->getHandlers(), $handler_id, $name, $arguments);
    }
public function callHandler ( $ handler_id , $ name , array $ arguments = array ( ) ) { return Handler :: call ( $ this -> getHandlers ( ) , $ handler_id , $ name , $ arguments ) ; }
Call a credential handler
@param string $handler_id
@param string $name
@param array $arguments
@return mixed
Call a credential handler