@defer.inlineCallbacks
    def current_state_for_user(self, user_id):
        res = yield self.current_state_for_users([user_id])
        defer.returnValue(res[user_id])
Plot the epipole and epipolar line F*x=0
dataset/ETHPy150Open matrix-org/synapse/synapse/handlers/presence.py/PresenceHandler.current_state_for_user--crossover with--dataset/ETHPy150Open jesolem/PCV/PCV/geometry/sfm.py/plot_epipolar_line