===description===
mismatchingReturnTypes
===file===
<?php
                    interface I1 {
                      public function foo(): string;
                    }
                    interface I2 {
                      public function foo(): int;
                    }
                    class A implements I1, I2 {
                      public function foo(): string {
                        return "hello";
                      }
                    }
===expect===
MethodSignatureMismatch
===ignore===
TODO
