gh-151910: Add tkinter.ttk.Treeview methods for the Tk 9.1 enhanced treeview#151911

serhiy-storchaka merged 4 commits into

python:mainpython/cpython:mainfrom

serhiy-storchaka:tkinter-treeview-9.1serhiy-storchaka/cpython:tkinter-treeview-9.1Copy head branch name to clipboard