public static com.google.storagetransfer.v1.proto.TransferTypes.PosixFilesystem parseFrom(
        java.io.InputStream input, com.google.protobuf.ExtensionRegistryLite extensionRegistry)
        throws java.io.IOException {
      return com.google.protobuf.GeneratedMessageV3.parseWithIOException(
          PARSER, input, extensionRegistry);
    }
<pre>
Root directory path to the filesystem.
</pre>

<code>string root_directory = 1;</code>

@return The bytes for rootDirectory.
java-storage-transfer/proto-google-cloud-storage-transfer-v1/src/main/java/com/google/storagetransfer/v1/proto/TransferTypes.java