code: func (v *TextTagTable) Lookup(name string) (*TextTag, error) {
  	cname := C.CString(name)
  	defer C.free(unsafe.Pointer(cname))
  	c := C.gtk_text_tag_table_lookup(v.native(), (*C.gchar)(cname))
  	if c == nil {
  		return nil, nilPtrErr
  	}
  	return wrapTextTag(glib.Take(unsafe.Pointer(c))), nil
  }
docs: // Lookup() is a wrapper around gtk_text_tag_table_lookup().