public DeleteLaunchTemplateVersionsResponseSuccessItem withVersionNumber(Long versionNumber) {
        setVersionNumber(versionNumber);
        return this;
    }
<p>
The version number of the launch template.
</p>

@param versionNumber
       The version number of the launch template.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-ec2/src/main/java/com/amazonaws/services/ec2/model/DeleteLaunchTemplateVersionsResponseSuccessItem.java