private void putPathBeforeUpdate(@Nullable FilePath path, @NotNull String listId) {
      if (path == null) return;

      String oldListId = myListsForPathsBeforeUpdate.get(path);
      if (CONFLICT_CHANGELIST_ID.equals(oldListId) || listId.equals(oldListId)) return;

      if (oldListId == null) {
        myListsForPathsBeforeUpdate.put(path, listId);
      }
      else {
        myListsForPathsBeforeUpdate.put(path, CONFLICT_CHANGELIST_ID);
      }
    }
private void putPathBeforeUpdate(@Nullable FilePath path, @NotNull String listId)