gtkTextBufferInsert, but the insertion will not occur if
iter is at a non-editable location in the buffer. Usually you
want to prevent insertions at ineditable locations if the insertion
results from a user action (is interactive).gtkTextBufferInsertInteractive(object, iter, text, default.editable)objectiterbuffertextdefault.editabledefault.editable indicates the editability of text that doesn't
have a tag affecting editability applied to it. Typically the
result of gtkTextViewGetEditable is appropriate here.