def get_initial_features(self, sequence, y):
       if(y not in self.initial_state_feature_cache):
           edge_idx = []
           edge_idx =  self.add_initial_features(sequence, y, edge_idx)
           self.initial_state_feature_cache[y] = edge_idx
       return self.initial_state_feature_cache[y]
dataset/ETHPy150Open LxMLS/lxmls-toolkit/lxmls/sequences/id_feature.py/IDFeatures.get_initial_features/original