@Override
  public MapSettings setProperty(String key, String value) {
    return (MapSettings) super.setProperty(key, value);
  }
@Test
  public void set_property_boolean() {
    Settings settings = new MapSettings();
    settings.setProperty("foo", true);
    settings.setProperty("bar", false);
    assertThat(settings.getBoolean("foo")).isTrue();
    assertThat(settings.getBoolean("bar")).isFalse();
    assertThat(settings.getString("foo")).isEqualTo("true");
    assertThat(settings.getString("bar")).isEqualTo("false");
  }