final protected function assertInterfaceExists(string $interfaceName): void
    {
        self::assertTrue(\interface_exists($interfaceName), \sprintf(
            'Failed asserting that an interface "%s" exists.',
            $interfaceName
        ));
    }
final protected function assertInterfaceExists(string $interfaceName): void
    {
        self::assertTrue(\interface_exists($interfaceName), \sprintf(
            'Failed asserting that an interface "%s" exists.',
            $interfaceName
        ));
    }
final protected function assertInterfaceExists ( string $ interfaceName ) : void { self :: assertTrue ( \ interface_exists ( $ interfaceName ) , \ sprintf ( 'Failed asserting that an interface "%s" exists.' , $ interfaceName ) ) ; }
Asserts that an interface exists.

@param string $interfaceName
Asserts that an interface exists .