private boolean isForm(final Map<Object, Object> rawDataBinding) {
    return (!rawDataBinding.containsKey(TYPE_META_DATA_PROPERTY)
        && rawDataBinding.containsKey(OLD_META_DATA_PROPERTY)
        && rawDataBinding.containsKey(NEW_META_DATA_PROPERTY));
  }
AbstractBaseController class contains common functionalities required for other controllers.

@since GemFire 8.0
geode-web-api/src/main/java/org/apache/geode/rest/internal/web/controllers/AbstractBaseController.java