public static String pickBestEncoding(String acceptHeader, Set<String> customMimeTypesSupported)
  {
    return pickBestEncoding(acceptHeader, null, customMimeTypesSupported);
  }
@Test(dataProvider = "successfulMatch")
  public void testPickBestEncodingWithValidMimeTypes(String header, String result)
  {
    Assert.assertEquals(RestUtils.pickBestEncoding(header, Collections.emptySet()), result);
  }