public DescribeMapRunResult withStartDate(java.util.Date startDate) {
        setStartDate(startDate);
        return this;
    }
<p>
The date when the Map Run was started.
</p>

@param startDate
       The date when the Map Run was started.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-stepfunctions/src/main/java/com/amazonaws/services/stepfunctions/model/DescribeMapRunResult.java