code: public static long decodeMachineId(byte[] flakeBytes) {
          ByteBuffer buffer = ByteBuffer.allocate(16);
          buffer.put(flakeBytes);
          buffer.flip();
          buffer.getLong();
          return buffer.getLong() >>> 16;
      }
docs: Return the machine id from the given encoded Snowflake id.
  
  @param flakeBytes the id to decode from