code: function MerkleBlockPacket(block) {
    if (!(this instanceof MerkleBlockPacket))
      return new MerkleBlockPacket(block);
  
    Packet.call(this);
  
    this.block = block || new MerkleBlock();
  }
docs: Represents a `merkleblock` packet.
  @constructor
  @param {MerkleBlock?} block
  @property {MerkleBlock} block