===description===
preventVoidToNullConversionSignature
===file===
<?php
                    class A {
                        public function foo(): ?string {
                            return rand(0, 1) ? "hello" : null;
                        }
                    }

                    class B extends A {
                        public function foo(): void {
                            return;
                        }
                    }
===expect===
MethodSignatureMismatch
===ignore===
TODO
