Change record status: 
Introduced in branch: 
1.x
Introduced in version: 
1.0.4
Description: 

Drupal\lb_default_blocks\Plugin\Block\DefaultBlock::getPosition() can return NULL if the layout position referenced by the block has been deleted.

As a result the return typehint for Drupal\lb_default_blocks\Plugin\Block\DefaultBlock::getPosition() has changed

Before

protected function getPosition(): LayoutPositionInterface;

After

protected function getPosition(): ?LayoutPositionInterface;
Impacts: 
Module developers