Decorator on method in class should be called

Native usability is a 
```python
class MyClass:
    @timeti.profiler
    def my_method(self, a):
        return a
```

But it does not work. If I call profiler, it works: 

```python
class MyClass:
    @timeti.profiler()
    def my_method(self, a):
        return a
```