undefined class FlutterFlowTheme

dependency has flutterflow_ui: ^0.3.1 

import 'package:flutterflow_ui/flutterflow_ui.dart'; is there  Flutter Error: ----------------------------------------------------------- undefined class FlutterFlowTheme  lib/home_page_widget.dart:43:26: Error: The getter 'FlutterFlowTheme' isn't defined for the class '_HomePageWidgetState'.  - '_HomePageWidgetState' is from 'package:flutterflow_t_1/home_page_widget.dart' ('lib/home_page_widget.dart'). Try correcting the name to the name of an existing getter, or defining a getter or field named 'FlutterFlowTheme'.         backgroundColor: FlutterFlowTheme.of(context).primary,                          ^^^^^^^^^^^^^^^^ -------------------------------------------------------------------  While trying to update packages ------------------------------- flutter pub outdated Showing outdated packages. [*] indicates versions that are not the latest available.  Package Name  Current  Upgradable  Resolvable  Latest    direct dependencies: collection    *1.18.0  *1.18.0     *1.18.0     1.19.0    dev_dependencies: all up-to-date. --------------------------------------------------------------------  child: Scaffold(         key: scaffoldKey,         backgroundColor: FlutterFlowTheme.of(context).primary,