code: def _init_menubar(self):
      menubar = Menu(self._top)
  
      filemenu = Menu(menubar, tearoff=0)
      filemenu.add_command(
          label="Print to Postscript",
          underline=0,
          command=self._cframe.print_to_file,
          accelerator="Ctrl-p",
      )
      filemenu.add_command(
          label="Exit",
          underline=1,
          command=self.destroy,
          accelerator="Ctrl-x",
      )
      menubar.add_cascade(label="File", underline=0, menu=filemenu)
  
      zoommenu = Menu(menubar, tearoff=0)
      zoommenu.add_radiobutton(
          label="Tiny",
          variable=self._size,
          underline=0,
          value=10,
          command=self.resize,
      )
      zoommenu.add_radiobutton(
          label="Small",
          variable=self._size,
          underline=0,
          value=12,
          command=self.resize,
      )
      zoommenu.add_radiobutton(
          label="Medium",
          variable=self._size,
          underline=0,
          value=14,
          command=self.resize,
      )
      zoommenu.add_radiobutton(
          label="Large",
          variable=self._size,
          underline=0,
          value=28,
          command=self.resize,
      )
      zoommenu.add_radiobutton(
          label="Huge",
          variable=self._size,
          underline=0,
          value=50,
          command=self.resize,
      )
      menubar.add_cascade(label="Zoom", underline=0, menu=zoommenu)
  
      self._top.config(menu=menubar)
  
imports: from tkinter import IntVar, Menu, Tk
  from nltk.draw.util import BoxWidget, CanvasFrame, CanvasWidget, OvalWidget, ParenWidget, TextWidget
  from nltk.tree import Tree
  from nltk.util import in_idle
label_desc: Use image node_id 3 for calling the TreeView obj's underlying member method code with example usage: obj._init_menubar() without return types