return this.value == ((CountingSupplier) obj).value;
      }
      return false;
    }

    @Override
    public int hashCode() {
      return value;
    }
  }

  public void testForSupplier() {
    Supplier<Integer> supplier = new CountingSupplier();
    Function<@Nullable Object, Integer> function = Functions.forSupplier(supplier);

    assertEquals(1, (int) function.apply(null));

        return this.value == ((CountingSupplier) obj).value;
      }
      return false;
    }

    @Override
    public int hashCode() {
      return value;
    }
  }

  public void testForSupplier() {
    Supplier<Integer> supplier = new CountingSupplier();
    Function<@Nullable Object, Integer> function = Functions.forSupplier(supplier);

    assertEquals(1, (int) function.apply(null));