code: public static <T> Position.Readable<T> readOnly(final Typed<T> typed, final T value) {
          return readOnly(typed, (Supplier<T>) () -> value);
      }
docs: Get a read-only position of type {@code typed.type} and value {@code value}.
  
  @param typed not {@code null}
  @param value
  @return Position.Readable