Msieprawski\ResourceTable\Generators\Collection::_prepareFilterValue PHP Method

    private function _prepareFilterValue(array $column, $value)
    {
        if (!isset($column['filter'])) {
            // There is no filter function so we'll search for plain value
            return $value;
        }
        // Filter function found - lets use it!
        return $column['filter']($value);
    }