code: public S isSameAs(A expected) {
      objects.assertSame(description, actual, expected);
      return myself;
    }
docs: Verifies that the <em>actual</em> value is the same as the given one.
  
  @param expected the given value to compare the <em>actual</em> value to.
  @return {@code this} assertion object.
  @throws AssertionError if the <em>actual</em> value is not the same as the given one.