editable
Returns whether the character at @iter is within an editable region of text.
Non-editable text is “locked” and can’t be changed by the user via GtkTextView. If no tags applied to this text affect editability, @default_setting will be returned.
You don’t want to use this function to decide whether text can be inserted at @iter, because for insertion you don’t want to know whether the char at @iter is inside an editable range, you want to know whether a new character inserted at @iter would be inside an editable range. Use method@Gtk.TextIter.can_insert to handle this case.
Return
whether @iter is inside an editable range
Parameters
defaultSetting
true if text is editable by default