def h2_headers(self, node=None, secret=None, multiplexed=None, af=None):
headers = HTTPHeaderMap()
if node:
if isinstance(node, (tuple, list, set)):
for n in node:
headers.update({Headers.node: n})
else:
headers.update({Headers.node: node})
if secret and af != socket.AF_UNIX:
headers.update({Headers.secret: secret})
if multiplexed:
headers.update({Headers.multiplexed: "true"})
return headers
