}
    }

    private static Type extractOwnerClass(ExecutableElement executableElement) {
        Optional<? extends AnnotationMirror> maybeStaticMethod = findAnnotationMirror(executableElement, CallableKind.StaticMethod.class);
        List<VariableElement> receivers = executableElement.getParameters().stream()
            .filter(it -> it.getAnnotation(ParameterKind.Receiver.class) != null)
            .collect(Collectors.toList());

    assertFalse(delegate.isOverridable());
    assertFalse(delegate.isVarArgs());
  }

  public void testStaticMethod_isOverridable() throws Exception {
    Invokable<?, ?> delegate = Prepender.method("staticMethod");
    assertTrue(delegate.isStatic());
    assertFalse(delegate.isOverridable());
    assertFalse(delegate.isVarArgs());
  }

  public void testStaticFinalMethod_isFinal() throws Exception {

    assertFalse(delegate.isOverridable());
    assertFalse(delegate.isVarArgs());
  }

  public void testStaticMethod_isOverridable() throws Exception {
    Invokable<?, ?> delegate = Prepender.method("staticMethod");
    assertTrue(delegate.isStatic());
    assertFalse(delegate.isOverridable());
    assertFalse(delegate.isVarArgs());
  }

  public void testStaticFinalMethod_isFinal() throws Exception {

            if (callable.getKind() != CallableKindInfo.STATIC_METHOD && callable.getKind() != CallableKindInfo.INSTANCE_METHOD) {
                throw new Failure(
                    "Only @" + CallableKind.StaticMethod.class.getSimpleName() + " or @" + CallableKind.InstanceMethod.class.getSimpleName() + " can use Kotlin default parameters"
                );
            }