Drupal\Core\Block

Defines a base block implementation that most blocks plugins will extend.

Manages discovery and instantiation of block plugins.

Provides the base implementation of a block plugin.

Provides an interface for the discovery and instantiation of block plugins.

Defines the required interface for all block plugins.

The interface for "main page content" blocks.

The interface for "messages" (#type => status_messages) blocks.

The interface for "title" blocks.