Change record status: 
Project: 
Introduced in branch: 
8.0.x
Description: 

\Drupal\rest\Plugin\Type\ResourcePluginManager::getInstance() is removed.

As getInstance() does nothing but calls createInstance(), so it is useless.

For all modules that call ::getInstance(), must change these calls according the below code examples

Before:

$resourceManager->getInstance([
  'id' => $id,
]);

After:

$resourceManager->createInstance($id);
Impacts: 
Module developers
Updates Done (doc team, etc.)
Online documentation: 
Not done
Theming guide: 
Not done
Module developer documentation: 
Not done
Examples project: 
Not done
Coder Review: 
Not done
Coder Upgrade: 
Not done
Other: 
Other updates done