'Append the specified L{content} to the I{parent}.
@param parent: The parent node to append to.
@type parent: L{Element}
@param content: The content to append.
@type content: L{Object}'

def append(self, parent, content):

    log.debug('appending    parent:\n%s\ncontent:\n%s', parent, content)
    if self.start(content):
        self.appender.append(parent, content)
        self.end(parent, content)
