/** * <code>optional .alluxio.grpc.file.FileInfo fileInfo = 1;</code> */ private com.google.protobuf.SingleFieldBuilderV3< alluxio.grpc.FileInfo, alluxio.grpc.FileInfo.Builder, alluxio.grpc.FileInfoOrBuilder> getFileInfoFieldBuilder() { if (fileInfoBuilder_ == null) { fileInfoBuilder_ = new com.google.protobuf.SingleFieldBuilderV3< alluxio.grpc.FileInfo, alluxio.grpc.FileInfo.Builder, alluxio.grpc.FileInfoOrBuilder>( getFileInfo(), getParentForChildren(), isClean()); fileInfo_ = null; } return fileInfoBuilder_; } public final Builder setUnknownFields(