src/vs/workbench/contrib/emmet/browser/actions/expandAbbreviation.ts/ExpandAbbreviationAction/constructor
class ExpandAbbreviationAction:	constructor() {
		super({
			id: 'editor.emmet.action.expandAbbreviation',
			label: nls.localize('expandAbbreviationAction', "Emmet: Expand Abbreviation"),
			alias: 'Emmet: Expand Abbreviation',
			precondition: EditorContextKeys.writable,
			actionName: 'expand_abbreviation',
			kbOpts: {
				primary: KeyCode.Tab,
				kbExpr: ContextKeyExpr.and(
					EditorContextKeys.editorTextFocus,
					EditorContextKeys.tabDoesNotMoveFocus,
					ContextKeyExpr.has('config.emmet.triggerExpansionOnTab')
				),
				weight: KeybindingWeight.EditorContrib
			},
			menuOpts: {
				menuId: MenuId.MenubarEditMenu,
				group: '5_insert',
				title: nls.localize({ key: 'miEmmetExpandAbbreviation', comment: ['&& denotes a mnemonic'] }, "Emmet: E&&xpand Abbreviation"),
				order: 3
			}
		});

	}