public AutomationExecution withExecutionStartTime(java.util.Date executionStartTime) {
        setExecutionStartTime(executionStartTime);
        return this;
    }
<p>
The time the execution started.
</p>

@param executionStartTime
       The time the execution started.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-ssm/src/main/java/com/amazonaws/services/simplesystemsmanagement/model/AutomationExecution.java