public Builder addBullets(org.bwapi.proxy.messages.GameMessages.Bullet value) {
        if (bulletsBuilder_ == null) {
          if (value == null) {
            throw new NullPointerException();
          }
          ensureBulletsIsMutable();
          bullets_.add(value);
          onChanged();
        } else {
          bulletsBuilder_.addMessage(value);
        }
        return this;
      }