/**
* Add a user to an existing role.
*
* @param Role $role Existing role to be added to
* @param int $subject_id Initialized user instance
* @throws \RBAC\Exception\ValidationError
* @return bool Database execution success status
*/
public function roleAddSubjectId(Role $role, $subject_id)
{
return $this->storage->roleAddSubjectId($role, $subject_id);
}
