Dummy class to repository

tests.php

<?php

namespace Main\Repository;

interface HogeRepository
{
  public getVolumes(): int;
}

namespace Tests\Dummy;

final class Hoge implements HogeRepository
{
  public $getVolumes;
  
  // もっと楽に書ける方法はないものか…
  public getVolumes(): int
  {
    $mt = __FUNCTION__;
    return $this->{$mt};
  }
}