public Builder addWhatUses(org.bwapi.proxy.messages.GameMessages.UnitType value) {
        if (whatUsesBuilder_ == null) {
          if (value == null) {
            throw new NullPointerException();
          }
          ensureWhatUsesIsMutable();
          whatUses_.add(value);
          onChanged();
        } else {
          whatUsesBuilder_.addMessage(value);
        }
        return this;
      }