docs: def renderFromWorkitem(self, copied_from, keep=False,
                             encoding="UTF-8", **kwargs):
          """Render the template directly from some to-be-copied
          :class:`rtcclient.workitem.Workitem` without saving to a file
  
          :param copied_from: the to-be-copied
              :class:`rtcclient.workitem.Workitem` id
          :param keep (default is False): If `True`, some of the below fields
              will remain unchangeable with the to-be-copied
              :class:`rtcclient.workitem.Workitem`.
              Otherwise for `False`.
  
                  * teamArea (Team Area)
                  * ownedBy (Owned By)
                  * plannedFor(Planned For)
                  * severity(Severity)
                  * priority(Priority)
                  * filedAgainst(Filed Against)
          :param encoding (default is "UTF-8"): coding format
          :param kwargs: The `kwargs` dict is used to fill the template.
              These two parameter are mandatory:
  
                  * description
                  * title
  
              Some of below parameters (which may not be included in some
              customized workitem type ) are mandatory if `keep` is set to
              `False`; Optional for otherwise.
  
                  * teamArea (Team Area)
                  * ownedBy (Owned By)
                  * plannedFor(Planned For)
                  * severity(Severity)
                  * priority(Priority)
                  * filedAgainst(Filed Against)
  
              Actually all these needed keywords/attributes/fields can be
              retrieved by
              :class:`rtcclient.template.Templater.listFieldsFromWorkitem`
  
          :return: the :class:`string` object
          :rtype: string
          """
  
          temp = jinja2.Template(self.getTemplate(copied_from,
                                                  template_name=None,
                                                  template_folder=None,
                                                  keep=keep,
                                                  encoding=encoding))
          return temp.render(**kwargs)