Change record status: 
Project: 
Introduced in branch: 
8.x-2.x
Introduced in version: 
8.x-2.0-alpha6
Description: 

The prepareData() method had been removed from the JsonapiHelperInterface.

You can now call it statically from the EntityShareUtility class.

Before:

$this->jsonapiHelper->prepareData($json['data']);

After:

use Drupal\entity_share\EntityShareUtility;

EntityShareUtility::prepareData($json['data']);
Impacts: 
Module developers