public UpdatePortfolioRequest withAddTags(Tag... addTags) {
        if (this.addTags == null) {
            setAddTags(new java.util.ArrayList<Tag>(addTags.length));
        }
        for (Tag ele : addTags) {
            this.addTags.add(ele);
        }
        return this;
    }
<p>
The tags to add.
</p>
<p>
<b>NOTE:</b> This method appends the values to the existing list (if any). Use
{@link #setAddTags(java.util.Collection)} or {@link #withAddTags(java.util.Collection)} if you want to override
the existing values.
</p>

@param addTags
       The tags to add.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-servicecatalog/src/main/java/com/amazonaws/services/servicecatalog/model/UpdatePortfolioRequest.java