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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 _getter(self):
 """ Return a function object suitable for the "get" side of the property descriptor. This default getter returns the child element with matching tag name or |None| if not present. """

        def get_child_element(obj):
            return obj.find(qn(self._nsptagname))
        get_child_element.__doc__ = (
            '``<%s>`` child element or |None| if not present.'
            % self._nsptagname
        )
        return get_child_element