public void setUserStackAssociations(java.util.Collection<UserStackAssociation> userStackAssociations) {
        if (userStackAssociations == null) {
            this.userStackAssociations = null;
            return;
        }

        this.userStackAssociations = new java.util.ArrayList<UserStackAssociation>(userStackAssociations);
    }
<p>
The UserStackAssociation objects.
</p>

@param userStackAssociations
       The UserStackAssociation objects.
aws-java-sdk-appstream/src/main/java/com/amazonaws/services/appstream/model/DescribeUserStackAssociationsResult.java