public static DeleteColumnRequest buildDeleteColumnRequest(final TableName tableName,
    final byte[] columnName, final long nonceGroup, final long nonce) {
    DeleteColumnRequest.Builder builder = DeleteColumnRequest.newBuilder();
    builder.setTableName(ProtobufUtil.toProtoTableName(tableName));
    builder.setColumnName(UnsafeByteOperations.unsafeWrap(columnName));
    builder.setNonceGroup(nonceGroup);
    builder.setNonce(nonce);
    return builder.build();
  }
Create a protocol buffer DeleteColumnRequest
@return a DeleteColumnRequest
hbase-client/src/main/java/org/apache/hadoop/hbase/shaded/protobuf/RequestConverter.java