Neos\FluidAdaptor\ViewHelpers\Form\AbstractFormViewHelper::registerFieldNameForFormTokenGeneration PHP Method

    protected function registerFieldNameForFormTokenGeneration($fieldName)
    {
        if ($this->viewHelperVariableContainer->exists(\Neos\FluidAdaptor\ViewHelpers\FormViewHelper::class, 'formFieldNames')) {
            $formFieldNames = $this->viewHelperVariableContainer->get(\Neos\FluidAdaptor\ViewHelpers\FormViewHelper::class, 'formFieldNames');
        } else {
            $formFieldNames = array();
        }
        $formFieldNames[] = $fieldName;
        $this->viewHelperVariableContainer->addOrUpdate(\Neos\FluidAdaptor\ViewHelpers\FormViewHelper::class, 'formFieldNames', $formFieldNames);
    }