@Headers("Accept: application/json")
@PATCH("/notifications/viewed")
Observable<ResponseBody> patchNotifications();
 

/**
 * Appends new content to an existing page
 * specified by page id
 *
 * Note: This passes a blank Accept-Encoding header to
 * work around a known issue with the PATCH on this OneNote API
 *
 * @param encoding
 * @param version
 * @param pageId
 * @param body
 * @param callback
 */
@PATCH("/{version}/me/notes/pages/{pageId}/content")
void patchPage(
        @Header("Accept-Encoding") String encoding,
        @Path("version") String version,
        @Path("pageId") String pageId,
        @Body TypedString body,
        Callback<Envelope<Page>> callback
);
 

/**
 * Performs a request to update the card.
 *
 * @param cardId The id of the card.
 * @param updateFields The fields to update.
 * @param callback A callback to receive the request information.
 */

@PATCH("/v0/me/cards/{cardId}")
void update(@Path("cardId") String cardId, @Body HashMap<String, Object> updateFields, Callback<Card> callback);
 

/**
 * Performs a request to update the user values.
 *
 * @param field An {@link HashMap<String, Object>} with the user field to change and the value.
 * @param callback A callback to receive the request information.
 */

@PATCH("/v0/me")
void updateUser(@Body HashMap<String, Object> field, Callback<User> callback);