public static byte[] prependPBMagic(final byte[] bytes) {
    return Bytes.add(PB_MAGIC, bytes);
  }
Prepend the passed bytes with four bytes of magic, {@link ProtobufMagic#PB_MAGIC}, to flag what
follows as a protobuf in hbase. Prepend these bytes to all content written to znodes, etc.
@param bytes Bytes to decorate
@return The passed <code>bytes</code> with magic prepended (Creates a new byte array that is
        <code>bytes.length</code> plus {@link ProtobufMagic#PB_MAGIC}.length.
hbase-client/src/main/java/org/apache/hadoop/hbase/shaded/protobuf/ProtobufUtil.java