@tracer.wrap decorator

[janeklb]

Would be especially useful for wrapping methods..

(maybe it shouldn't be called tracer.wrap so as not to make the existing wrap implementation more complicated.. )

// The decorator (probably not declared like this, but just to serve as an example...)
tracer.wrap =
  (name: string): MethodDecorator =>
  (_target, _propertyKey, descriptor) => {
    descriptor.value = tracer.wrap(name, descriptor.value);
    return descriptor;
  };


// usage:
class MyClass {
  @tracer.wrap('fetchExample')
  fetchExample(): Promise<unknown> {
    return fetch('http://example.org');
  }
}