Appends text to the list of strings stored in combo_box.
This is the same as calling gtk.combo_box_text.ComboBoxText.insertText with a position of -1.
A string
Deprecated: Use gtk.drop_down.DropDown
Appends text to the list of strings stored in combo_box.
This is the same as calling gtk.combo_box_text.ComboBoxText.insertText with a position of -1.