@RequiresReadLock
  @RequiresBackgroundThread
  default @NotNull List<? extends @NotNull DocumentationTarget> documentationTargets(@NotNull Project project, @NotNull Symbol symbol) {
    return createMaybeSingletonList(documentationTarget(project, symbol));
  }
@RequiresReadLock
  @RequiresBackgroundThread
  default @NotNull List<? extends @NotNull DocumentationTarget> documentationTargets(@NotNull Project project, @NotNull Symbol symbol)