public static SamzaSqlInputMessage of(KV<Object, Object> keyAndMessageKV, SamzaSqlRelMsgMetadata metadata) {
    return new SamzaSqlInputMessage(keyAndMessageKV, metadata);
  }
Constructs a new SamzaSqMessage given the input arguments
@param keyAndMessageKV key-value of the message
@param metadata metadata of the message
@return new object of SamzaSqlInputMessage type
samza-sql/src/main/java/org/apache/samza/sql/SamzaSqlInputMessage.java