public Builder addStaticNeutralUnits(
          int index, org.bwapi.proxy.messages.GameMessages.UnitId value) {
        if (staticNeutralUnitsBuilder_ == null) {
          if (value == null) {
            throw new NullPointerException();
          }
          ensureStaticNeutralUnitsIsMutable();
          staticNeutralUnits_.add(index, value);
          onChanged();
        } else {
          staticNeutralUnitsBuilder_.addMessage(index, value);
        }
        return this;
      }