class_docstr: SumoTLManager is responsible for the management of the sumo traffic lights (i.e., keeps control
  of the current program, phase, ...)
class_docstr_tok: ["SumoTLManager","is","responsible","for","the","management","of","the","sumo","traffic","lights","(","i.e.",",","keeps","control","of","the","current","program",",","phase",",","...",")"]
docstr: Returns all the landmarks associated with a traffic light in the simulation.
docstr_tok: ["Returns","all","the","landmarks","associated","with","a","traffic","light","in","the","simulation","."]
code: def get_all_landmarks(self):
      """
      Returns all the landmarks associated with a traffic light in the simulation.
      """
      landmarks = set()
      for tlid, program_id in self._current_program.items():
          landmarks.update(
              self._tls[tlid][program_id].get_all_landmarks()
          )
      return landmarks
  
imports: import collections
  import enum
  import logging
  import os
  import carla
  import sumolib
  import traci
  from .constants import INVALID_ACTOR_ID
  import lxml.etree
label_desc: Use image node_id 5 for calling the SumoTLManager obj's underlying member method code with example usage: obj.get_all_landmarks() and returns: landmarks