docs: def removeChild(self, child_id):
          """Remove a child from current workitem
  
          :param child_id: the child workitem id/number
              (integer or equivalent string)
          """
  
          self.log.debug("Try to remove a child <Workitem %s> from current "
                         "<Workitem %s>",
                         child_id,
                         self)
          self._removeChildren([child_id])
          self.log.info("Successfully remove a child <Workitem %s> from "
                        "current <Workitem %s>",
                        child_id,
                        self)