code: def find_invisible_below(self):
      next_vis = self.GetFirstVisibleItem()
      if not next_vis.IsOk():
          return next_vis
      last_vis = next_vis
      while next_vis.IsOk():
          last_vis = next_vis
          next_vis = self.GetNextVisible(next_vis)
      if self.ItemHasChildren(last_vis) and self.IsExpanded(last_vis):
          return self.GetFirstChild(last_vis)
      elif self.GetNextSibling(last_vis).IsOk():
          return self.GetNextSibling(last_vis)
      elif self.GetNextSibling(self.GetItemParent(last_vis)).IsOk():
          return self.GetNextSibling(self.GetItemParent(last_vis))
      else:
          return self.GetNextSibling(
              self.GetItemParent(self.GetItemParent(last_vis))
          )
  
imports: import logging
  import os
  import sys
  import uuid
  from urllib.request import url2pathname
  from urllib.parse import urlparse
  import wx
  import wx.lib.scrolledpanel
  from cellprofiler_core.pipeline import ImageFile
  from cellprofiler_core.preferences import report_progress
label_desc: Use image node_id 34 for calling the PathListCtrl obj's underlying member method code with example usage: obj.find_invisible_below() and returns: next_vis, self, self, self, self