@NotNull
  public RefElementNode createRefElementNode(@Nullable RefEntity entity,
                                             @NotNull Supplier<? extends RefElementNode> supplier,
                                             @NotNull InspectionTreeNode parent) {
    return getOrAdd(entity, parent, () -> ReadAction.compute(supplier::get));
  }
@NotNull
  public RefElementNode createRefElementNode(@Nullable RefEntity entity,
                                             @NotNull Supplier<? extends RefElementNode> supplier,
                                             @NotNull InspectionTreeNode parent)