public function setRolesById($roles)
    {
        $roles = is_array($roles)? $roles : [$roles];
        return $this->roles()->sync($roles);
    }
public function setRolesById($roles)
    {
        $roles = is_array($roles)? $roles : [$roles];
        return $this->roles()->sync($roles);
    }
public function setRolesById ( $ roles ) { $ roles = is_array ( $ roles ) ? $ roles : [ $ roles ] ; return $ this -> roles ( ) -> sync ( $ roles ) ; }
Reassign roles from an id or an array of role Ids

@param int|array $roles
@return void
Reassign roles from an id or an array of role Ids