Add deprecated accessors for indicatorForUncheckedCheckBox and indicatorForCheckedCheckBox (#459)
diff --git a/lib/src/block_syntaxes/list_syntax.dart b/lib/src/block_syntaxes/list_syntax.dart
index ce46166..4b7619f 100644
--- a/lib/src/block_syntaxes/list_syntax.dart
+++ b/lib/src/block_syntaxes/list_syntax.dart
@@ -9,6 +9,18 @@
import 'ordered_list_with_checkbox_syntax.dart';
import 'unordered_list_with_checkbox_syntax.dart';
+/// As of Markdown 6.0.1 invisible indicators for checked/unchecked checkboxes are
+/// no longer used. These constants are now empty strings to reflect that.
+@Deprecated(
+ 'This string is no longer used internally. It will be removed in a future version.')
+const indicatorForUncheckedCheckBox = '';
+
+/// As of Markdown 6.0.1 invisible indicators for checked/unchecked checkboxes are
+/// no longer used. These constants are now empty strings to reflect that.
+@Deprecated(
+ 'This string is no longer used internally. It be will be removed in a future version.')
+const indicatorForCheckedCheckBox = '';
+
class ListItem {
const ListItem(
this.lines, {
