code: def bolditalic(name, rawtext, text, lineno, inliner, options={}, content=[]):
      
      node = nodes.inline(rawtext, text)
      node.set_class('bolditalic')
      return [node], []
docs: Add bolditalic role.
  
      Returns 2 part tuple containing list of nodes to insert into the
      document and a list of system messages.  Both are allowed to be
      empty.
  
      :param name: The role name used in the document.
      :param rawtext: The entire markup snippet, with role.
      :param text: The text marked with the role.
      :param lineno: The line number where rawtext appears in the input.
      :param inliner: The inliner instance that called this function.
      :param options: Directive options for customization.
      :param content: The directive content for customization.