@Deprecated
    public @NotNull Builder addAll(@NotNull DataContext dataContext, DataKey<?> @NotNull ... keys) {
      if (keys.length == 0) {
        throw new IllegalArgumentException("Keys argument must not be empty");
      }
      for (DataKey<?> key : keys) {
        //noinspection unchecked
        add((DataKey<Object>)key, dataContext.getData(key));
      }
      return this;
    }
@Deprecated
    public @NotNull Builder addAll(@NotNull DataContext dataContext, DataKey<?> @NotNull ... keys)