convertGiftToStars(businessConnectionId, ownedGiftId, form = {}) {
    form.business_connection_id = businessConnectionId;
    form.owned_gift_id = ownedGiftId;
    return this._request('convertGiftToStars', { form });
  }
This method converts a given regular gift to Telegram Stars.

Requires the **can_convert_gifts_to_stars** business bot right.

@param {String} businessConnectionId Unique identifier of the business connection.
@param {String} ownedGiftId Unique identifier of the regular gift that should be converted to Telegram Stars.
@param {Object} [options] Additional Telegram query options
@return {Promise} On success, returns True.
@see https://core.telegram.org/bots/api#convertgifttostars