Grid/Column/Column.php
public function renderCell($value, $row, $router)
    {
        if (is_callable($this->callback)) {
            return call_user_func($this->callback, $value, $row, $router);
        }

        $value = is_bool($value) ? (int) $value : $value;
        if (array_key_exists((string) $value, $this->values)) {
            $value = $this->values[$value];
        }

        return $value;
    }
public function renderCell($value, $row, $router)
    {
        if (is_callable($this->callback)) {
            return call_user_func($this->callback, $value, $row, $router);
        }

        $value = is_bool($value) ? (int) $value : $value;
        if (array_key_exists((string) $value, $this->values)) {
            $value = $this->values[$value];
        }

        return $value;
    }
Draw cell.

@param string $value
@param Row    $row
@param $router

@return string