@org.apache.thrift.annotation.Nullable
  public java.lang.Object getFieldValue(_Fields field) {
    switch (field) {
    case IS_DELETE:
      return isIsDelete();

    case COLUMN:
      return getColumn();

    case VALUE:
      return getValue();

    case WRITE_TO_WAL:
      return isWriteToWAL();

    }
    throw new java.lang.IllegalStateException();
  }
Returns true if field writeToWAL is set (has been assigned a value) and false otherwise
hbase-thrift/src/main/java/org/apache/hadoop/hbase/thrift/generated/Mutation.java