Getting the confluence Page FULL high-lighted text

I need to fetch “highlighted” text on which inline comment has been posted. Same as in this issue:

I’ve got problem with text being “croped” - if text is to long (more than 256 characters) it will be cut. Unfortunately, there is no answer in foregoing post.

At present I do GET request that looks like this:${my_page_id}?expand=extensions.inlineProperties

and returns:


   extesnions : {
       inlineProperties: {
           originalSelection : "First 252 chars of my comment...",

How can I fetch full marked text? I can’t find “Get by marker-ref” api-request.