public void setMainframeAction(MainframeActionSummary mainframeAction) {
        this.mainframeAction = mainframeAction;
    }
<p>
The mainframe action of the step run summary.
</p>

@param mainframeAction
       The mainframe action of the step run summary.
aws-java-sdk-apptest/src/main/java/com/amazonaws/services/apptest/model/StepRunSummary.java