Replace the element by own text content.

        :param element: The element.
        :type element: hatemile.util.html.htmldomelement.HTMLDOMElement

def _replace_element_by_own_content(self, element):
        """
        Replace the element by own text content.

        :param element: The element.
        :type element: hatemile.util.html.htmldomelement.HTMLDOMElement
        """
        # pylint: disable=no-self-use

        if element.has_children_elements():
            children = element.get_children_elements()
            for child in children:
                element.insert_before(child)
            element.remove_node()
        elif element.has_children():
            element.replace_node(element.get_first_node_child())