Keyword arguments:
            namespaceURI -- namespace of element
            localName -- local name of element

def getElement(self, namespaceURI, localName):
        '''
        Keyword arguments:
            namespaceURI -- namespace of element
            localName -- local name of element
        '''
        node = self._dom.getElement(self.node, localName, namespaceURI, default=None)
        if node:
            return ElementProxy(self.sw, node)
        return None