Permissions::getPermission

public function getPermission($entityCode, $actionCode)
{
	$permissionMap = $this->getMap();
	if(!isset($permissionMap[$entityCode][$actionCode]))
		throw new ArgumentException('Unknown entity or action code');

	return (isset($this->permissions[$entityCode][$actionCode]) ? $this->permissions[$entityCode][$actionCode] : self::PERMISSION_NONE);
}