message: linking polymorphic_conversion.cpp to behavior
diff: @@ -55,7 +55,7 @@ cc_library(
  cc_library(
  name = "behavior",
  hdrs = ["models/behavior.hpp"],
  - srcs = ["models/behavior.cpp"],
  + srcs = ["models/behavior.cpp", "polymorphic_conversion.cpp"],
  deps = [
  "//python/models/plan:planners",
  ":common",
  