Gtk.TextBuffer.prototype.insert_interactive

function insert_interactive(iter:Gtk.TextIter, text:String, len:Number, default_editable:Boolean):Boolean {
    // Gjs wrapper for gtk_text_buffer_insert_interactive()
}

Like Gtk.TextBuffer.prototype.insert, 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).

default_editable indicates the editability of text that doesn't have a tag affecting editability applied to it. Typically the result of Gtk.get_editable is appropriate here.