protected function getPluralForm($quantity, Locale $locale)
    {
        if (!is_numeric($quantity)) {
            return null;
        } else {
            return $this->pluralsReader->getPluralForm($quantity, $locale);
        }
    }
protected function getPluralForm($quantity, Locale $locale)
    {
        if (!is_numeric($quantity)) {
            return null;
        } else {
            return $this->pluralsReader->getPluralForm($quantity, $locale);
        }
    }
protected function getPluralForm ( $ quantity , Locale $ locale ) { if ( ! is_numeric ( $ quantity ) ) { return null ; } else { return $ this -> pluralsReader -> getPluralForm ( $ quantity , $ locale ) ; } }
Get the plural form to be used.

If $quantity is numeric and non-NULL, the plural form for provided $locale will be
chosen according to it.

In all other cases, NULL is returned.

@param mixed $quantity
@param Locale $locale
@return string
Get the plural form to be used .