@Override
  public @NotNull Set<String> getAbbreviations(@NotNull String actionId) {
    Set<String> abbreviations = actionIdToAbbreviations.get(actionId);
    return abbreviations == null ? Collections.emptySet() : Collections.unmodifiableSet(abbreviations);
  }
@Override
  public @NotNull Set<String> getAbbreviations(@NotNull String actionId)