def METHOD_NAME(self):
    # init and place scrollbar
    self.vert_scrollbar = SafeScrollbar(self, orient=tk.VERTICAL)
    self.vert_scrollbar.grid(row=0, column=1, sticky=tk.NSEW)
    # init and place tree
    self.tree = ttk.Treeview(self, yscrollcommand=self.vert_scrollbar.set)
    self.tree.grid(row=0, column=0, sticky=tk.NSEW)
    self.vert_scrollbar["command"] = self.tree.yview
    # set single-cell frame
    self.columnconfigure(0, weight=1)
    self.rowconfigure(0, weight=1)
    # init tree events
    self.tree.bind("<<TreeviewSelect>>", self._on_select, True)
    self.tree.bind("<Map>", self._update_frame_contents, True)
    # configure the only tree column
    self.tree.column("#0", anchor=tk.W, stretch=True)
    # self.tree.heading('#0', text='Item (type @ line)', anchor=tk.W)
    self.tree["show"] = ("tree",)
    self._class_img = get_workbench().get_image("outline-class")
    self._method_img = get_workbench().get_image("outline-method")