def construct_mapping(self, node, deep=False):
        # type: (Any, bool) -> Any
        """deep is True when creating an object/mapping recursively,
        in that case want the underlying elements available during construction
        """
        if isinstance(node, MappingNode):
            self.flatten_mapping(node)
        return BaseConstructor.construct_mapping(self, node, deep=deep)
deep is True when creating an object/mapping recursively,
        in that case want the underlying elements available during construction
        
dynaconf/vendor/ruamel/yaml/constructor.py