TypeVariable<?>[] variables = Prepender.constructor().getTypeParameters();
    assertThat(variables).hasLength(1);
    assertEquals("T", variables[0].getName());
  }

  public void testConstructor_parameters() throws Exception {
    Invokable<?, Prepender> delegate = Prepender.constructor(String.class, int.class);
    ImmutableList<Parameter> parameters = delegate.getParameters();
    assertEquals(2, parameters.size());