code: @NonNull
      public static Changes newInstance(@NonNull String affectedTable, @Nullable String... affectedTags) {
          checkNotNull(affectedTable, "Please specify affected table");
          return new Changes(singleton(affectedTable), nonNullSet(affectedTags));
      }
docs: Creates {@link Changes} container with info about changes.
  
  @param affectedTable table that was affected.
  @param affectedTags  nullable set of affected tags.
  @return new immutable instance of {@link Changes}.