final public static function revokePermissions( $role, $permissions ) {
	
		$role = trim($role);
	
		if ( ! $r = Role::findByName($role) ) return self::__ERROR( __('Role does not exist!') );
		
		foreach (explode(',', $permissions) as $permission) {
			
			$permission = trim($permission);
			
			if ( $r->hasPermission($permission) ) {
			
				if ( ! $p = Permission::findByName($permission) ) return self::__ERROR( __('Permission does not exist!') );
				
				RolePermission::deleteWhere('RolePermission','role_id='.$r->id.', permission_id='.$p->id);
				if ( RolePermission::countFrom('RolePermission','role_id='.$r->id.', permission_id='.$p->id) > 0 ) return  self::__ERROR( __('Could not remove Role->Permission link!') );
			
			}
		
		}

		return true;
	}