class Block

class Block extends Plugin {
  
  /**
   * The plugin ID.
   *
   * @var string
   */
  public $id;
  
  /**
   * The administrative label of the block.
   *
   * @var \Drupal\Core\Annotation\Translation
   *
   * @ingroup plugin_translatable
   */
  public $admin_label = '';
  
  /**
   * The category in the admin UI where the block will be listed.
   *
   * @var \Drupal\Core\Annotation\Translation
   *
   * @ingroup plugin_translatable
   */
  public $category = '';
  
  /**
   * An array of context definitions describing the context used by the plugin.
   *
   * The array is keyed by context names.
   *
   * @var \Drupal\Core\Annotation\ContextDefinition[]
   */
  public $context_definitions = [];

}