public static @Unmodifiable @NotNull Collection<Language> findInstancesByMimeType(@Nullable String mimeType) {
    List<Language> result = mimeType == null ? null : registeredMimeTypes.get(mimeType);
    return result == null ? Collections.emptyList() : result;
  }
public static @Unmodifiable @NotNull Collection<Language> findInstancesByMimeType(@Nullable String mimeType)