lib/protocol/protocol.js
function encodeGroupProtocol (protocol) {
  this.Int16BE(protocol.name.length).string(protocol.name).string(_encodeProtocolData(protocol));
}
function encodeGroupProtocol (protocol) {
  this.Int16BE(protocol.name.length).string(protocol.name).string(_encodeProtocolData(protocol));
}
/*

ProtocolType => "consumer"

ProtocolName => AssignmentStrategy
AssignmentStrategy => string

ProtocolMetadata => Version Subscription UserData
Version => int16
Subscription => [Topic]
Topic => string
UserData => bytes