public void addToValues(java.nio.ByteBuffer elem) {
    if (this.values == null) {
      this.values = new java.util.ArrayList<java.nio.ByteBuffer>();
    }
    this.values.add(elem);
  }
Returns true if field columns is set (has been assigned a value) and false otherwise
hbase-thrift/src/main/java/org/apache/hadoop/hbase/thrift/generated/TAppend.java