src/Russian/CardinalNumeralGenerator.php
public static function getCase($number, $case, $gender = self::MALE)
    {
        $case = static::canonizeCase($case);
        $forms = static::getCases($number, $gender);
        return $forms[$case];
    }
public static function getCase($number, $case, $gender = self::MALE)
    {
        $case = static::canonizeCase($case);
        $forms = static::getCases($number, $gender);
        return $forms[$case];
    }
@param        $number
@param        $case
@param string $gender

@return mixed|void
@throws \Exception