set_text_with_mnemonic
Description:
Sets the label’s text from the string str.
If characters in str are preceded by an underscore, they are underlined indicating that they represent a keyboard accelerator
called a mnemonic. The mnemonic key can be used to activate another widget, chosen automatically, or explicitly using [
method@Gtk.Label.set_mnemonic_widget].
Parameters:
| this |
a `GtkLabel` |
| str |
a string |