addCustomField() public static méthode

public static addCustomField ( Infusionsoft_Generated_Base &$object, $displayName, $dataType, $groupId, Infusionsoft_App $app = null )
$object Infusionsoft_Generated_Base
$app Infusionsoft_App
}
?>
"><br/>
            displayName: <input type="text" name="displayName" value="<?php 
if (isset($_REQUEST['displayName'])) {
    echo htmlspecialchars($_REQUEST['displayName']);
}
?>
"><br/>
            dataType: <input type="text" name="dataType" value="<?php 
if (isset($_REQUEST['dataType'])) {
    echo htmlspecialchars($_REQUEST['dataType']);
}
?>
"><br/>
            groupId: <input type="text" name="groupId" value="<?php 
if (isset($_REQUEST['groupId'])) {
    echo htmlspecialchars($_REQUEST['groupId']);
}
?>
"><br/>
    <input type="submit">
<input type="hidden" name="go">
</form>
<?php 
include '../infusionsoft.php';
include 'testUtils.php';
if (isset($_REQUEST['go'])) {
    $out = Infusionsoft_DataService::addCustomField($_REQUEST['context'], $_REQUEST['displayName'], $_REQUEST['dataType'], $_REQUEST['groupId']);
    var_dump($out);
}