lib/types/index.js
function FrameHeader(version, flags, streamId, opcode, bodyLength) {
  this.version = version;
  this.flags = flags;
  this.streamId = streamId;
  this.opcode = opcode;
  this.bodyLength = bodyLength;
}
function FrameHeader(version, flags, streamId, opcode, bodyLength) {
  this.version = version;
  this.flags = flags;
  this.streamId = streamId;
  this.opcode = opcode;
  this.bodyLength = bodyLength;
}
classes 
Represents a frame header that could be used to read from a Buffer or to write to a Buffer
@ignore
@param {Number} version Protocol version
@param {Number} flags
@param {Number} streamId
@param {Number} opcode
@param {Number} bodyLength
@constructor