cakephp ->set() a value in an object -

i can use cakephp set() add value in object @ top level need set value object inside object , can seem access it. possible?

i need add business_id inside employee object.

i though might use $user->set->employee('business_id', '1'); error on employee part.

object(app\model\entity\user) {  'email' => 'dfgdfg@sdfsdf.com', 'new_password' => 'ttt', 'confirm_password' => 'ttt', 'employee' => object(app\model\entity\employee) {      'name' => 'dsfsfsdfsfd',     'email' => 'sdfsdfsdf@sdfsdf.com',     'surname' => 'sdfsdfsdfsdf',     'employee_num' => 'sdfsdfsdfsd',     '[new]' => true, 

i tried couple of different ways , got work $user->employee->set('business_id', '1');