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错误：在我的项目中导入颜色选择器包时，方法“AlwaysWinPanGestureRecognizer...”的参数“事件”

欢迎我在项目中导入flutter_colorpicker 包时遇到问题： import 'package:flutter_colorpicker/flutter_colorpicker.dart'; 我收到此错误：

/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/flutter_colorpicker-0.5.0/lib/src/hsv_picker.dart:730:43: Error: The parameter 'event' of the method 'AlwaysWinPanGestureRecognizer.addAllowedPointer' has type 'PointerDownEvent', which does not match the corresponding type, 'PointerEvent', in the overridden method, 'DragGestureRecognizer.addAllowedPointer'.
 - 'PointerDownEvent' is from 'package:flutter/src/gestures/events.dart' ('/C:/src/flutter/packages/flutter/lib/src/gestures/events.dart').
 - 'PointerEvent' is from 'package:flutter/src/gestures/events.dart' ('/C:/src/flutter/packages/flutter/lib/src/gestures/events.dart').
Change to a supertype of 'PointerEvent', or, for a covariant parameter, a subtype.
  void addAllowedPointer(PointerDownEvent event) {
                                          ^
/C:/src/flutter/packages/flutter/lib/src/gestures/monodrag.dart:256:8: Context: This is the overridden method ('addAllowedPointer').
  void addAllowedPointer(PointerEvent event) {
       ^

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这是颤振医生的结果：