-param-url"><span class="type-annotation">String</span> <span class="parameter-name">url</span></span>, <span class="parameter" id="postFormData-param-data"><span class="type-annotation">Map&lt;String,String&gt;</span> <span class="parameter-name">data</span></span>, {<span class="parameter" id="postFormData-param-withCredentials"><span class="type-annotation">bool</span> <span class="parameter-name">withCredentials</span></span>, <span class="parameter" id="postFormData-param-responseType"><span class="typ