message: Highway_rss example only works if rss is defined
diff: @@ -18,7 +18,10 @@ from bark.runtime.runtime import Runtime
  from bark.runtime.viewer.panda3d_easy import Panda3dViewer
  from bark.core.models.behavior import *
  +try:
  from bark.core.world.evaluation import EvaluatorRss
  +except:
  + raise ImportError("This example requires building RSS, please run with \"bazel run //examples:highway_rss --define rss=true\"")
  # parameters
  param_server = ParameterServer(filename="examples/params/centered_highway_merge_configurable.json")
  