public Builder clearUid() {
        bitField0_ = (bitField0_ & ~0x00000008);
        uid_ = 0;
        onChanged();
        return this;
      }
<pre>
Specifies how each file's POSIX user ID (UID) attribute should be handled
by the transfer. By default, UID is not preserved. Only applicable to
transfers involving POSIX file systems, and ignored for other transfers.
</pre>

<code>.google.storagetransfer.v1.MetadataOptions.UID uid = 4;</code>

@return This builder for chaining.
java-storage-transfer/proto-google-cloud-storage-transfer-v1/src/main/java/com/google/storagetransfer/v1/proto/TransferTypes.java