final protected function assertClassExists(string $className): void
    {
        self::assertTrue(\class_exists($className), \sprintf(
            'Failed asserting that a class "%s" exists.',
            $className
        ));
    }
final protected function assertClassExists(string $className): void
    {
        self::assertTrue(\class_exists($className), \sprintf(
            'Failed asserting that a class "%s" exists.',
            $className
        ));
    }
final protected function assertClassExists ( string $ className ) : void { self :: assertTrue ( \ class_exists ( $ className ) , \ sprintf ( 'Failed asserting that a class "%s" exists.' , $ className ) ) ; }
Asserts that a class exists.

@param string $className
Asserts that a class exists .