public Builder clearRegion() {
        region_ = getDefaultInstance().getRegion();
        bitField0_ = (bitField0_ & ~0x00000008);
        onChanged();
        return this;
      }
<pre>
Specifies the region to sign requests with. This can be left blank if
requests should be signed with an empty region.
</pre>

<code>string region = 5;</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