public Builder clear() {
        super.clear();
        if (identityBuilder_ == null) {
          identity_ = com.alibaba.otter.node.etl.model.protobuf.BatchProto.Identity.getDefaultInstance();
        } else {
          identityBuilder_.clear();
        }
        bitField0_ = (bitField0_ & ~0x00000001);
        if (filesBuilder_ == null) {
          files_ = java.util.Collections.emptyList();
          bitField0_ = (bitField0_ & ~0x00000002);
        } else {
          filesBuilder_.clear();
        }
        return this;
      }
Protobuf type {@code com.alibaba.otter.node.etl.model.protobuf.FileBatch}
node/etl/src/main/java/com/alibaba/otter/node/etl/model/protobuf/BatchProto.java