'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.'

@property
def _getter(self):

    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
