          """ Repack or unpack columns based on display columns """
          for idx, subframe in enumerate(self.subframes):
              if idx < self.columns and not subframe.winfo_ismapped():
                  logger.trace("Packing subframe: %s", subframe)
                  subframe.pack(padx=5, pady=5, side=tk.LEFT, anchor=tk.N, expand=True, fill=tk.X)
              elif idx >= self.columns and subframe.winfo_ismapped():
                  logger.trace("Forgetting subframe: %s", subframe)
                  subframe.pack_forget()
 
</s> remove         """ Returns the number if items held in this containter """
 </s> add         """ Returns the number of items held in this containter """
            logger.trace("Processing subframe: %s", subframe)
          """ Repack or unpack columns based on display columns """
          for idx, subframe in enumerate(self.subframes):
            logger.trace("Processing subframe: %s", subframe)
              if idx < self.columns and not subframe.winfo_ismapped():
                  logger.trace("Packing subframe: %s", subframe)
                  subframe.pack(padx=5, pady=5, side=tk.LEFT, anchor=tk.N, expand=True, fill=tk.X)
              elif idx >= self.columns and subframe.winfo_ismapped():
                  logger.trace("Forgetting subframe: %s", subframe)
                  subframe.pack_forget()
keep add keep keep keep keep keep keep
 GUI: Fix disappearing columns on resize 
lib/gui/control_helper.py