public FleetLaunchTemplateSpecificationRequest withVersion(String version) {
        setVersion(version);
        return this;
    }
<p>
The launch template version number, <code>$Latest</code>, or <code>$Default</code>. You must specify a value,
otherwise the request fails.
</p>
<p>
If the value is <code>$Latest</code>, Amazon EC2 uses the latest version of the launch template.
</p>
<p>
If the value is <code>$Default</code>, Amazon EC2 uses the default version of the launch template.
</p>

@param version
       The launch template version number, <code>$Latest</code>, or <code>$Default</code>. You must specify a
       value, otherwise the request fails.</p>
       <p>
       If the value is <code>$Latest</code>, Amazon EC2 uses the latest version of the launch template.
       </p>
       <p>
       If the value is <code>$Default</code>, Amazon EC2 uses the default version 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/FleetLaunchTemplateSpecificationRequest.java