code: def import_taskfile(self, refobj, taskfileinfo):
          
          # work in root namespace
          with common.preserve_namespace(":"):
              jbfile = JB_File(taskfileinfo)
              filepath = jbfile.get_fullpath()
              ns_suggestion = reftrack.get_namespace(taskfileinfo)
              nodes = cmds.file(filepath, i=True, namespace=ns_suggestion, returnNewNodes=True, preserveReferences=True)  # import
              assert nodes, 'Nothing was imported! this is unusual!'
              ns = common.get_top_namespace(nodes[0])  # get the actual namespace
              cmds.setAttr("%s.namespace" % refobj, ns, type="string")
              nscontent = cmds.namespaceInfo(ns, listOnlyDependencyNodes=True, dagPath=True)  # get the content
              scenenode = self.get_scenenode(nscontent)
              self.get_refobjinter().connect_reftrack_scenenode(refobj, scenenode)
              dagcontent = cmds.ls(nodes, ap=True, assemblies=True)  # get only the dagnodes so we can group them
              if not dagcontent:
                  return  # no need for a top group if there are not dagnodes to group
              # group the dagnodes in the new namespace
              grpname = reftrack.get_groupname(taskfileinfo)
              reftrack.group_content(dagcontent, ns, grpname, "jb_asset")
              return
docs: Import the given taskfileinfo and update the refobj
  
          :param refobj: the refobject
          :type refobj: refobject
          :param taskfileinfo: the taskfileinfo to reference
          :type taskfileinfo: :class:`jukeboxcore.filesys.TaskFileInfo`
          :returns: None
          :rtype: None
          :raises: None