public void addToGroupNames(java.lang.String elem) {
    if (this.groupNames == null) {
      this.groupNames = new java.util.ArrayList<java.lang.String>();
    }
    this.groupNames.add(elem);
  }
Returns true if field userName 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/GetPartitionsPsWithAuthRequest.java