@java.lang.Override
    public int getSerializedSize() {
      int size = memoizedSize;
      if (size != -1) return size;

      size = 0;
      if (((bitField0_ & 0x00000001) != 0)) {
        size += com.google.protobuf.CodedOutputStream.computeMessageSize(1, getTime());
      }
      if (valueCase_ == 2) {
        size +=
            com.google.protobuf.CodedOutputStream.computeMessageSize(
                2, (com.google.devtools.cloudtrace.v2.Span.TimeEvent.Annotation) value_);
      }
      if (valueCase_ == 3) {
        size +=
            com.google.protobuf.CodedOutputStream.computeMessageSize(
                3, (com.google.devtools.cloudtrace.v2.Span.TimeEvent.MessageEvent) value_);
      }
      size += getUnknownFields().getSerializedSize();
      memoizedSize = size;
      return size;
    }
<pre>
An event describing a message sent/received between Spans.
</pre>

<code>.google.devtools.cloudtrace.v2.Span.TimeEvent.MessageEvent message_event = 3;</code>
java-trace/proto-google-cloud-trace-v2/src/main/java/com/google/devtools/cloudtrace/v2/Span.java