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 to be able to have proper dependency injection in the method.

A new service had been created for that, 'entity_share_server.channel_manipulator'

Before:

$channel->getQuery();

After:

$this->channelManipulator->getQuery($channel);
Impacts: 
Module developers