message: add setter to json object options
diff: @@ -34,6 +34,20 @@ impl JsonObjectOptions {
  pub fn get_text_indexing_options(&self) -> Option<&TextFieldIndexing> {
  self.indexing.as_ref()
  }
  +
  + /// Sets the field as stored
  + #[must_use]
  + pub fn set_stored(mut self) -> Self {
  + self.stored = true;
  + self
  + }
  +
  + /// Sets the field as indexed, with the specific indexing options.
  + #[must_use]
  + pub fn set_indexing_options(mut self, indexing: TextFieldIndexing) -> Self {
  + self.indexing = Some(indexing);
  + self
  + }
  }
  impl From<StoredFlag> for JsonObjectOptions {
  