public final boolean isPublic() {
    return Modifier.isPublic(getModifiers());
  }

  /** Returns true if the element is protected. */
  public final boolean isProtected() {
    return Modifier.isProtected(getModifiers());
  }

  /** Returns true if the element is package-private. */
  public final boolean isPackagePrivate() {
    return !isPrivate() && !isPublic() && !isProtected();
  }

    for (Method method : cls.getDeclaredMethods()) {
      Invokable<?, ?> invokable = Invokable.from(method);
      invokable.setAccessible(true);
      if (invokable.isPublic() && invokable.isStatic() && !invokable.isSynthetic()) {
        builder.add(invokable);
      }
    }
    return new FactoryMethodReturnValueTester(cls, builder.build(), "public static methods");
  }