code: def GetNumberRows(self):
      return len(self.v.data)
  
imports: import wx
  import wx.grid
  from cellprofiler_core.preferences import get_error_color
  from cellprofiler_core.setting import Table
label_desc: Use image node_id 8 for calling the TableController obj's underlying member method code with example usage: obj.GetNumberRows() and returns: len