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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def add_method_model(self, func, # type: Callable name=None, # type: Optional[str] description=None, # type: Optional[str] ):
 """Register a function to be added to the Block as a MethodModel"""

        return self._field_registry.add_method_model(
            func, name, description, self._part)