public Builder clear() {
        super.clear();
        id_ = 0;
        bitField0_ = (bitField0_ & ~0x00000001);
        player_ = 0;
        bitField0_ = (bitField0_ & ~0x00000002);
        type_ = org.bwapi.proxy.messages.GameMessages.BulletType.Melee;
        bitField0_ = (bitField0_ & ~0x00000004);
        if (sourceBuilder_ == null) {
          source_ = org.bwapi.proxy.messages.GameMessages.UnitId.getDefaultInstance();
        } else {
          sourceBuilder_.clear();
        }
        bitField0_ = (bitField0_ & ~0x00000008);
        if (positionBuilder_ == null) {
          position_ = org.bwapi.proxy.messages.BasicTypes.Position.getDefaultInstance();
        } else {
          positionBuilder_.clear();
        }
        bitField0_ = (bitField0_ & ~0x00000010);
        angle_ = 0D;
        bitField0_ = (bitField0_ & ~0x00000020);
        velocityX_ = 0D;
        bitField0_ = (bitField0_ & ~0x00000040);
        velocityY_ = 0D;
        bitField0_ = (bitField0_ & ~0x00000080);
        if (targetBuilder_ == null) {
          target_ = org.bwapi.proxy.messages.GameMessages.UnitId.getDefaultInstance();
        } else {
          targetBuilder_.clear();
        }
        bitField0_ = (bitField0_ & ~0x00000100);
        if (targetPositionBuilder_ == null) {
          targetPosition_ = org.bwapi.proxy.messages.BasicTypes.Position.getDefaultInstance();
        } else {
          targetPositionBuilder_.clear();
        }
        bitField0_ = (bitField0_ & ~0x00000200);
        removeTimer_ = 0;
        bitField0_ = (bitField0_ & ~0x00000400);
        exists_ = false;
        bitField0_ = (bitField0_ & ~0x00000800);
        isVisible_ = false;
        bitField0_ = (bitField0_ & ~0x00001000);
        return this;
      }