### Question:
ExternalPropertiesConfigurationFactory { static ExternalConfigurationModel getConfig() { final ExternalConfigurationProvider provider = mergeConfigs(getExternalConfigurations()); return provider == null ? null : provider.getConfiguration(); }  static boolean configure(Configurable config);  }### Answer:
@Test(expected = IllegalArgumentException.class) public void unsupportedMapperTest() { getConfig().as(CommonProperties.JSON_PROCESSING_FEATURE_DISABLE, Double.class); }