public void setFieldValue(_Fields field, @org.apache.thrift.annotation.Nullable java.lang.Object value) {
    switch (field) {
    case COLUMN_NAME:
      if (value == null) {
        unsetColumnName();
      } else {
        if (value instanceof byte[]) {
          setColumnName((byte[])value);
        } else {
          setColumnName((java.nio.ByteBuffer)value);
        }
      }
      break;

    case CELL:
      if (value == null) {
        unsetCell();
      } else {
        setCell((TCell)value);
      }
      break;

    }
  }
Returns true if field cell is set (has been assigned a value) and false otherwise
hbase-thrift/src/main/java/org/apache/hadoop/hbase/thrift/generated/TColumn.java