public TestRunStepSummary withRunStartTime(java.util.Date runStartTime) {
        setRunStartTime(runStartTime);
        return this;
    }
<p>
The run start time of the test run step summary.
</p>

@param runStartTime
       The run start time of the test run step summary.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-apptest/src/main/java/com/amazonaws/services/apptest/model/TestRunStepSummary.java