public Builder clearEndTime() {
      bitField0_ = (bitField0_ & ~0x00000020);
      endTime_ = null;
      if (endTimeBuilder_ != null) {
        endTimeBuilder_.dispose();
        endTimeBuilder_ = null;
      }
      onChanged();
      return this;
    }
<pre>
End of the time interval (inclusive) during which the trace data was
collected from the application.
</pre>

<code>.google.protobuf.Timestamp end_time = 6;</code>
java-trace/proto-google-cloud-trace-v1/src/main/java/com/google/devtools/cloudtrace/v1/ListTracesRequest.java