public Builder mergeTransferOptions(
          com.google.storagetransfer.v1.proto.TransferTypes.TransferOptions value) {
        if (transferOptionsBuilder_ == null) {
          if (((bitField0_ & 0x00000800) != 0)
              && transferOptions_ != null
              && transferOptions_
                  != com.google.storagetransfer.v1.proto.TransferTypes.TransferOptions
                      .getDefaultInstance()) {
            getTransferOptionsBuilder().mergeFrom(value);
          } else {
            transferOptions_ = value;
          }
        } else {
          transferOptionsBuilder_.mergeFrom(value);
        }
        if (transferOptions_ != null) {
          bitField0_ |= 0x00000800;
          onChanged();
        }
        return this;
      }
<pre>
If the option
[delete_objects_unique_in_sink][google.storagetransfer.v1.TransferOptions.delete_objects_unique_in_sink]
is `true` and time-based object conditions such as 'last modification time'
are specified, the request fails with an
[INVALID_ARGUMENT][google.rpc.Code.INVALID_ARGUMENT] error.
</pre>

<code>.google.storagetransfer.v1.TransferOptions transfer_options = 6;</code>
java-storage-transfer/proto-google-cloud-storage-transfer-v1/src/main/java/com/google/storagetransfer/v1/proto/TransferTypes.java