src/Form/Element/FileUpload.php
public function fileCountValidationCallback()
    {
        if ($this->form && ($object = $this->form->getObject())) {
            if ($this->getMaxFileCount() - 1 < count($object)) {
                return false;
            }
        }

        return true;
    }
public function fileCountValidationCallback()
    {
        if ($this->form && ($object = $this->form->getObject())) {
            if ($this->getMaxFileCount() - 1 < count($object)) {
                return false;
            }
        }

        return true;
    }
Callback for file count validation.

@internal
This function gets the value passed in as variable,
but we do not need it.
@return bool