public void setAction(String action) {
        this.action = action;
    }
<p>
Specify <code>INSERT</code> to add an <a>XssMatchSetUpdate</a> to an <a>XssMatchSet</a>. Use <code>DELETE</code>
to remove an <code>XssMatchSetUpdate</code> from an <code>XssMatchSet</code>.
</p>

@param action
       Specify <code>INSERT</code> to add an <a>XssMatchSetUpdate</a> to an <a>XssMatchSet</a>. Use
       <code>DELETE</code> to remove an <code>XssMatchSetUpdate</code> from an <code>XssMatchSet</code>.
@see ChangeAction
aws-java-sdk-waf/src/main/java/com/amazonaws/services/waf/model/XssMatchSetUpdate.java