docs: def parse(data):
  		"""
  		returns a list of header tags
  		"""
  		reader = io.BytesIO(data)
  		headers = []
  		while reader.tell() < len(data):
  			h = Header()
  			h.tag = int.from_bytes(reader.read(2), byteorder='big', signed=False)
  			h.taglen = int.from_bytes(reader.read(2), byteorder='big', signed=False)
  			h.tagdata = reader.read(h.taglen)
  			headers.append(h)
  		return headers