public Builder clear() {
        super.clear();
        id_ = 0;
        bitField0_ = (bitField0_ & ~0x00000001);
        region1_ = 0;
        bitField0_ = (bitField0_ & ~0x00000002);
        region2_ = 0;
        bitField0_ = (bitField0_ & ~0x00000004);
        if (side1Builder_ == null) {
          side1_ = org.bwapi.proxy.messages.BasicTypes.Position.getDefaultInstance();
        } else {
          side1Builder_.clear();
        }
        bitField0_ = (bitField0_ & ~0x00000008);
        if (side2Builder_ == null) {
          side2_ = org.bwapi.proxy.messages.BasicTypes.Position.getDefaultInstance();
        } else {
          side2Builder_.clear();
        }
        bitField0_ = (bitField0_ & ~0x00000010);
        if (centerBuilder_ == null) {
          center_ = org.bwapi.proxy.messages.BasicTypes.Position.getDefaultInstance();
        } else {
          centerBuilder_.clear();
        }
        bitField0_ = (bitField0_ & ~0x00000020);
        width_ = 0D;
        bitField0_ = (bitField0_ & ~0x00000040);
        return this;
      }