def get_hydrated(self, activities):
        activity = activities[int(self.serialization_id)]
        activity.dehydrated = False
        return activity
Adds a header to the underlying HTTP connection.
dataset/ETHPy150Open tschellenbach/Stream-Framework/stream_framework/activity.py/DehydratedActivity.get_hydrated--crossover with--dataset/ETHPy150Open AppScale/appscale/AppServer/lib/PyAMF-0.6.1/pyamf/remoting/client/__init__.py/RemotingService.addHTTPHeader