src/Element/RangeFilter.php
public function prepareElement(FormInterface $form)
    {
        $name = $this->getName();

        $this->startElement->setName($name . '[start]');
        $this->endElement->setName($name . '[end]');
    }
public function prepareElement(FormInterface $form)
    {
        $name = $this->getName();

        $this->startElement->setName($name . '[start]');
        $this->endElement->setName($name . '[end]');
    }
Prepare the form element (mostly used for rendering purposes).

@param FormInterface $form

@return void