block_place_toolbar in core/modules/block_place/

protected static Toolbar::moduleHandler() Wraps

protected static Toolbar::breakpointManager()

public static ToolbarItem::preRenderToolbarItem($element)

public ToolbarItem::getInfo() Returns

Provides a render element for the default Drupal toolbar. Plugin annotation

public static Toolbar::preRenderToolbar($element)

public Toolbar::getInfo() Returns

Provides a toolbar item that is wrapped in markup for common styling. The 'tray' property contains a renderable array. Plugin