/** <code>optional .EventDataFormat data = 3;</code> */
 public Builder setData(
     akka.persistence.kafka.journal.EventFormats.EventDataFormat.Builder builderForValue) {
   if (dataBuilder_ == null) {
     data_ = builderForValue.build();
     onChanged();
   } else {
     dataBuilder_.setMessage(builderForValue.build());
   }
   bitField0_ |= 0x00000004;
   return this;
 }