• On analysis level 2, PHPStan would consider $entity->get('my_field')->value invalid but $entity->get('my_field')->first()->value valid. The former is allowed due field item list classes defaulting to the first value when using the magically __get call.
• When an entity query is executed, the return type may be an int or array of entities, depending on if the count method was called before execution, creating a count query. PHPStan read the return type from the methods docblock, and that was it. Now, it will properly return int, array<int, string> for content entities, and array<string, string> for configuration entities.
• Ensure that entity storage methods return the appropriate entity class if it has been defined in the configuration. Before this release, phpstan-drupal only allowed configuring the entity storage class to improve static analysis. With 1.1.0, the entity class can also be defined. If a storage class is not provided, but the entity class is, it will infer the appropriate default storage based on if it is a content or configuration entity

All of these features are provided by implementing dynamic return type extensions. A dynamic return type extension is used to help PHPStan understand what will be returned to a method based on arguments passed to it.