human
Solve the following python programming problem given the following code:
@ staticmethod 
def register_of_version(version) : 
    def _register_of_version(cls) : 
        OfCtl._OF_VERSIONS.setdefault (version, cls) 
        return cls 
return version 

    
    

    Fix the buggy line: return version
assistant
#Here is Python code to fix the buggy line: return version
.

return def _register_of_version(