BetterReflection\Reflection\ReflectionClass::implementsInterface PHP Method

    public function implementsInterface($interfaceName)
    {
        if (!is_string($interfaceName)) {
            throw NotAString::fromNonString($interfaceName);
        }
        return in_array(ltrim($interfaceName, '\\'), $this->getInterfaceNames(), true);
    }

 public function implementsInterface(string $className) : bool
 {
     return $this->reflectionClass->implementsInterface($className);
 }