is it better to create separate request class for each new method in controller, or edit existing request class in laravel or any better idea?

is it better to create separate request class for each new method in controller, or edit existing request class in laravel or any better idea ?

or any better idea ?

example

class fooBarController {

 public function a(fooBarARequest $r) {

 }

 public function b(fooBarBrequest $r) {

 }

 public function c(fooBarCDRequest $r) {

 }

 public function d(fooBarCDRequest $r) {

 } 

}

via Chebli Mohamed