public Builder addChokepoints(
          org.bwapi.proxy.messages.TerrainMessages.Chokepoint.Builder builderForValue) {
        if (chokepointsBuilder_ == null) {
          ensureChokepointsIsMutable();
          chokepoints_.add(builderForValue.build());
          onChanged();
        } else {
          chokepointsBuilder_.addMessage(builderForValue.build());
        }
        return this;
      }