src/vs/workbench/browser/parts/editor/titleControl.ts/TitleControl/actionViewItemProvider
class TitleControl:	private actionViewItemProvider(action: IAction): IActionViewItem | undefined {
		const activeEditorPane = this.group.activeEditorPane;

		// Check Active Editor
		if (activeEditorPane instanceof EditorPane) {
			const result = activeEditorPane.getActionViewItem(action);

			if (result) {
				return result;
			}
		}

		// Check extensions
		return createActionViewItem(this.instantiationService, action, { menuAsChild: this.renderDropdownAsChildElement });
	}