@java.lang.Override
    public com.google.protobuf.ByteString getRootDirectoryBytes() {
      java.lang.Object ref = rootDirectory_;
      if (ref instanceof java.lang.String) {
        com.google.protobuf.ByteString b =
            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
        rootDirectory_ = b;
        return b;
      } else {
        return (com.google.protobuf.ByteString) ref;
      }
    }
<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