public com.google.protobuf.Timestamp getStartTime() {
      if (startTimeBuilder_ == null) {
        return startTime_ == null ? com.google.protobuf.Timestamp.getDefaultInstance() : startTime_;
      } else {
        return startTimeBuilder_.getMessage();
      }
    }
<pre>
Start of the time interval (inclusive) during which the trace data was
collected from the application.
</pre>

<code>.google.protobuf.Timestamp start_time = 5;</code>

@return The startTime.
java-trace/proto-google-cloud-trace-v1/src/main/java/com/google/devtools/cloudtrace/v1/ListTracesRequest.java