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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 _find_name(self, name):
 """ Find the reference of a child having the given name :type name: ``str`` :param name: the child name (e.g. PID) :return: the element structure (see :func:`load_reference <hl7apy.load_reference>`) or ``None`` if the element has not been found """

        name = name.upper()
        element = self.element.find_child_reference(name)
        return element['name'] if element is not None else None