public Builder clearDroppedMessageEventsCount() {
        bitField0_ = (bitField0_ & ~0x00000004);
        droppedMessageEventsCount_ = 0;
        onChanged();
        return this;
      }
<pre>
The number of dropped message events in all the included time events.
If the value is 0, then no message events were dropped.
</pre>

<code>int32 dropped_message_events_count = 3;</code>

@return This builder for chaining.
java-trace/proto-google-cloud-trace-v2/src/main/java/com/google/devtools/cloudtrace/v2/Span.java