Retrieves the character displayed in place of the real characters
for entries with visibility set to false.
Note that GTK does not compute this value unless it needs it,
so the value returned by this function is not very useful unless
it has been explicitly set with [method@Gtk.Text.set_invisible_char].
Retrieves the character displayed in place of the real characters for entries with visibility set to false.
Note that GTK does not compute this value unless it needs it, so the value returned by this function is not very useful unless it has been explicitly set with [method@Gtk.Text.set_invisible_char].