public DescribeUserStackAssociationsResult withUserStackAssociations(UserStackAssociation... userStackAssociations) {
        if (this.userStackAssociations == null) {
            setUserStackAssociations(new java.util.ArrayList<UserStackAssociation>(userStackAssociations.length));
        }
        for (UserStackAssociation ele : userStackAssociations) {
            this.userStackAssociations.add(ele);
        }
        return this;
    }
<p>
The UserStackAssociation objects.
</p>
<p>
<b>NOTE:</b> This method appends the values to the existing list (if any). Use
{@link #setUserStackAssociations(java.util.Collection)} or
{@link #withUserStackAssociations(java.util.Collection)} if you want to override the existing values.
</p>

@param userStackAssociations
       The UserStackAssociation objects.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-appstream/src/main/java/com/amazonaws/services/appstream/model/DescribeUserStackAssociationsResult.java