message: draft room sub list item api
diff: @@ -29,11 +29,15 @@ class RoomSubList extends ResizeItem {
  }
  - scrollSizes() {
  - return {offsetHeight, scrollHeight};
  + id() {
  +
  }
  - id() {
  + maxSize() {
  +
  + }
  +
  + minSize() {
  }
  }
  