public void setReason(String reason) {
        this.reason = reason;
    }
<p>
The reason for connecting to the instance. This value is included in the details for the Amazon CloudWatch Events
event created when you start the session.
</p>

@param reason
       The reason for connecting to the instance. This value is included in the details for the Amazon CloudWatch
       Events event created when you start the session.
aws-java-sdk-ssm/src/main/java/com/amazonaws/services/simplesystemsmanagement/model/StartSessionRequest.java