<?php
trait Foo { use Foo { ff as abc; } private function a() { return 'sf';} public function ff() { return '2424';}}
class Bar {use Foo; }
class An extends Bar { use Foo; public $var; }
var_dump((new An())->abc());
Fatal error: Trait method ff has not been applied, because there are collisions with other trait methods on Bar in /in/aej1E on line 4
Process exited with code 255.