src/vs/workbench/browser/actions/layoutActions.ts/ToggleSidebarPositionAction/run
class ToggleSidebarPositionAction:	run(accessor: ServicesAccessor): Promise<void> {
		const layoutService = accessor.get(IWorkbenchLayoutService);
		const configurationService = accessor.get(IConfigurationService);

		const position = layoutService.getSideBarPosition();
		const newPositionValue = (position === Position.LEFT) ? 'right' : 'left';

		return configurationService.updateValue(sidebarPositionConfigurationKey, newPositionValue);
	}