code: def waypoint_current(self):
          '''return current waypoint'''
          if self.mavlink10():
              m = self.recv_match(type='MISSION_CURRENT', blocking=True)
          else:
              m = self.recv_match(type='WAYPOINT_CURRENT', blocking=True)
          return m.sef waypoint_current(self):
          '''return current waypoint'''
          if self.mavlink10():
              m = self.recv_match(type='MISSION_CURRENT', blocking=True)
          else:
              m = self.recv_match(type='WAYPOINT_CURRENT', blocking=True)
          return m.seq
docs: return current waypoint