How to use the html5lib.treebuilders._base.TreeBuilder function in html5lib

def insertComment(self, data, parent=None):
        if not self.rootInserted:
            self.initialComments.append(data)
        else:
            _base.TreeBuilder.insertComment(self, data, parent)

def insertComment(self, data, parent=None):
        if not self.rootInserted:
            self.initialComments.append(data)
        else:
            _base.TreeBuilder.insertComment(self, data, parent)

def getFragment(self):
        return html5lib.treebuilders._base.TreeBuilder.getFragment(self).element

# charEncoding to UTF-8 if it gets Unicode input.
            doc.original_encoding = None
        else:
            doc.original_encoding = parser.tokenizer.stream.charEncoding[0]

    def create_treebuilder(self, namespaceHTMLElements):
        self.underlying_builder = TreeBuilderForHtml5lib(
            self.soup, namespaceHTMLElements)
        return self.underlying_builder

    def test_fragment_to_document(self, fragment):
        """See `TreeBuilder`."""
        return u'%s' % fragment


class TreeBuilderForHtml5lib(html5lib.treebuilders._base.TreeBuilder):

    def __init__(self, soup, namespaceHTMLElements):
        self.soup = soup
        super(TreeBuilderForHtml5lib, self).__init__(namespaceHTMLElements)

    def documentClass(self):
        self.soup.reset()
        return Element(self.soup, self.soup, None)

    def insertDoctype(self, token):
        name = token["name"]
        publicId = token["publicId"]
        systemId = token["systemId"]

        doctype = Doctype.for_name_and_ids(name, publicId, systemId)
        self.soup.object_was_parsed(doctype)

def getFragment(self):
        return treebuilder_base.TreeBuilder.getFragment(self).element

def getFragment(self):
        return treebuilder_base.TreeBuilder.getFragment(self).element

def getFragment(self):
        return html5lib.treebuilders._base.TreeBuilder.getFragment(self).element

# charEncoding to UTF-8 if it gets Unicode input.
            doc.original_encoding = None
        else:
            doc.original_encoding = parser.tokenizer.stream.charEncoding[0]

    def create_treebuilder(self, namespaceHTMLElements):
        self.underlying_builder = TreeBuilderForHtml5lib(
            self.soup, namespaceHTMLElements)
        return self.underlying_builder

    def test_fragment_to_document(self, fragment):
        """See `TreeBuilder`."""
        return u'%s' % fragment


class TreeBuilderForHtml5lib(html5lib.treebuilders._base.TreeBuilder):

    def __init__(self, soup, namespaceHTMLElements):
        self.soup = soup
        super(TreeBuilderForHtml5lib, self).__init__(namespaceHTMLElements)

    def documentClass(self):
        self.soup.reset()
        return Element(self.soup, self.soup, None)

    def insertDoctype(self, token):
        name = token["name"]
        publicId = token["publicId"]
        systemId = token["systemId"]

        doctype = Doctype.for_name_and_ids(name, publicId, systemId)
        self.soup.object_was_parsed(doctype)