Which delegate usage would be the best to have in Pyobjus ?

poll_delegate_objus.py

# Solution 1
# original solution proposed in the PR
# pro: easy declaration
# cons: instanciation is a little bit hard to write
#       possible method conflict with multiple protocols 

class MyObjcDelegate:
    def connection_didFailWithError_(self, connection, error):
      print("Protocol method got called!!", connection, error)
      
delegate = objc_delegate(MyObjcDelegate(), ['NSURLConnectionDelegate'])
connection = NSURLConnection.connectionWithRequest_delegate_(request, delegate)


# Solution 2
# approach done by PyOBJC
# pro: close to Objective-C syntax
# cons: very very long method, a little verbose to instanciate 

class MyObjcDelegate(NSObject):
    def NSURLConnectionDelegate_connection_didFailWithError_(self, connection, error):
      print("Protocol method got called!!", connection, error)
      
delegate = MyObjcDelegate.alloc().init()
connection = NSURLConnection.connectionWithRequest_delegate_(request, delegate)


# Solution 3
# proposed by Mathieu and Gabriel, pyjnius style
# pro: syntax similar to PyJNIUS, short instanciation
# cons: possible method conflict with multiple protocols 

class MyObjcDelegate(ObjcDelegate):
    __protocols__ = ('NSURLConnectionDelegate', )
    def connection_didFailWithError_(self, connection, error):
      print("Protocol method got called!!", connection, error)
      
delegate = MyObjcDelegate()
connection = NSURLConnection.connectionWithRequest_delegate_(request, delegate)


# Solution 4
# proposed by Mathieu and Gabriel
# pro: easy to instanciate, good protocol separation
# cons: @protocol can be redundant

class MyObjcDelegate(ObjcDelegate):
    @protocol('NSURLConnectionDelegate')
    def connection_didFailWithError_(self, connection, error):
      print("Protocol method got called!!", connection, error)
      
delegate = MyObjcDelegate()
connection = NSURLConnection.connectionWithRequest_delegate_(request, delegate)