public Builder mergeEventStream(
          com.google.storagetransfer.v1.proto.TransferTypes.EventStream value) {
        if (eventStreamBuilder_ == null) {
          if (((bitField0_ & 0x00000200) != 0)
              && eventStream_ != null
              && eventStream_
                  != com.google.storagetransfer.v1.proto.TransferTypes.EventStream
                      .getDefaultInstance()) {
            getEventStreamBuilder().mergeFrom(value);
          } else {
            eventStream_ = value;
          }
        } else {
          eventStreamBuilder_.mergeFrom(value);
        }
        if (eventStream_ != null) {
          bitField0_ |= 0x00000200;
          onChanged();
        }
        return this;
      }
<pre>
Specifies the event stream for the transfer job for event-driven transfers.
When EventStream is specified, the Schedule fields are ignored.
</pre>

<code>.google.storagetransfer.v1.EventStream event_stream = 15;</code>
java-storage-transfer/proto-google-cloud-storage-transfer-v1/src/main/java/com/google/storagetransfer/v1/proto/TransferTypes.java