public void setErrorLevel(@NotNull List<? extends HighlightDisplayKey> keys, @NotNull HighlightDisplayLevel level, @Nullable String scopeName, @NotNull Project project) {
    for (HighlightDisplayKey key : keys) {
      setErrorLevel(key, level, scopeName, project);
    }
  }
public void setErrorLevel(@NotNull List<? extends HighlightDisplayKey> keys, @NotNull HighlightDisplayLevel level, @Nullable String scopeName, @NotNull Project project)