public Builder setKmsKey(
          com.google.storagetransfer.v1.proto.TransferTypes.MetadataOptions.KmsKey value) {
        if (value == null) {
          throw new NullPointerException();
        }
        bitField0_ |= 0x00000080;
        kmsKey_ = value.getNumber();
        onChanged();
        return this;
      }
<pre>
Specifies how each object's Cloud KMS customer-managed encryption key
(CMEK) is preserved for transfers between Google Cloud Storage buckets.  If
unspecified, the default behavior is the same as
[KMS_KEY_DESTINATION_BUCKET_DEFAULT][google.storagetransfer.v1.MetadataOptions.KmsKey.KMS_KEY_DESTINATION_BUCKET_DEFAULT].
</pre>

<code>.google.storagetransfer.v1.MetadataOptions.KmsKey kms_key = 8;</code>

@param value The kmsKey to set.
@return This builder for chaining.
java-storage-transfer/proto-google-cloud-storage-transfer-v1/src/main/java/com/google/storagetransfer/v1/proto/TransferTypes.java