Getting the confluence Page FULL high-lighted text

Hi,
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:
http://my-project.com/confluence/rest/api/content/${my_page_id}?expand=extensions.inlineProperties

and returns:

{

   extesnions : {
       inlineProperties: {
           originalSelection : "First 252 chars of my comment...",
           markerRef:"<someMarkerRef>"
      },
      ...
  }
  ...
}

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

I just stumbled upon this a few years later but adding my answer for anyone else who may find this.
The ADF content for the page will have the full text of the highlighted text. You can identify it by finding an “Annotation” with an attribute matching the markerRef. See sample below(with redacted text)

 {
      "type": "paragraph",
      "content": [
        {
          "text": "REDACTED",
          "type": "text"
        },
        {
          "text": "REDACTED",
          "type": "text",
          "marks": [
            {
              "type": "annotation",
              "attrs": {
                "annotationType": "inlineComment",
                "id": "0dd942af-6904-4470-86b0-2f7558b3a2f9"
              }
            }
          ]
        },
        {
          "text": "REDACTED",
          "type": "text"
        }
      ]
    },