public boolean isSet(_Fields field) {
    if (field == null) {
      throw new java.lang.IllegalArgumentException();
    }

    switch (field) {
    case FIELD_LIST:
      return isSetFieldList();
    case INCLUDE_PARAM_KEY_PATTERN:
      return isSetIncludeParamKeyPattern();
    case EXCLUDE_PARAM_KEY_PATTERN:
      return isSetExcludeParamKeyPattern();
    }
    throw new java.lang.IllegalStateException();
  }
Returns true if field corresponding to fieldID is set (has been assigned a value) and false otherwise
standalone-metastore/metastore-common/src/gen/thrift/gen-javabean/org/apache/hadoop/hive/metastore/api/GetProjectionsSpec.java