Change record status: 
Project: 
Introduced in branch: 
9.3.x
Introduced in version: 
9.3.0
Description: 

Summary

The Drupal\layout_builder\SectionStorage\SectionStorageTrait was deprecated and a new Drupal\layout_builder\SectionListTrait introduced to follow the naming pattern of other similar classes in the Drupal\layout_builder namespace. No method names have changed.

Before

// namespace + other class imports
use Drupal\layout_builder\SectionStorage\SectionStorageTrait;

class MyExampleClass {
    use SectionStorageTrait;
}

After

// namespace + other class imports
use Drupal\layout_builder\SectionListTrait;

class MyExampleClass {
    use SectionListTrait;
}

Impacts: 
Module developers
Site templates, recipes and distribution developers