while running code getting error

[supercool27]

/C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/video_player_platform_interface-2.1.0/lib/messages.dart:143:13: Error: The method 'setMockMessageHandler' isn't defined for the class 'BasicMessageChannel'.

• 'BasicMessageChannel' is from 'package:flutter/src/services/platform_channel.dart' ('/C:/src/flutter/packages/flutter/lib/src/services/platform_channel.dart').
  Try correcting the name to the name of an existing method, or defining a method named 'setMockMessageHandler'.
  channel.setMockMessageHandler((dynamic message) async {
  ^^^^^^^^^^^^^^^^^^^^^
  /C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/video_player_platform_interface-2.1.0/lib/messages.dart:151:13: Error: The method 'setMockMessageHandler' isn't defined for the class 'BasicMessageChannel'.
• 'BasicMessageChannel' is from 'package:flutter/src/services/platform_channel.dart' ('/C:/src/flutter/packages/flutter/lib/src/services/platform_channel.dart').
  Try correcting the name to the name of an existing method, or defining a method named 'setMockMessageHandler'.
  channel.setMockMessageHandler((dynamic message) async {
  ^^^^^^^^^^^^^^^^^^^^^
  /C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/video_player_platform_interface-2.1.0/lib/messages.dart:161:13: Error: The method 'setMockMessageHandler' isn't defined for the class 'BasicMessageChannel'.
• 'BasicMessageChannel' is from 'package:flutter/src/services/platform_channel.dart' ('/C:/src/flutter/packages/flutter/lib/src/services/platform_channel.dart').
  Try correcting the name to the name of an existing method, or defining a method named 'setMockMessageHandler'.
  channel.setMockMessageHandler((dynamic message) async {
  ^^^^^^^^^^^^^^^^^^^^^
  /C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/video_player_platform_interface-2.1.0/lib/messages.dart:171:13: Error: The method 'setMockMessageHandler' isn't defined for the class 'BasicMessageChannel'.
• 'BasicMessageChannel' is from 'package:flutter/src/services/platform_channel.dart' ('/C:/src/flutter/packages/flutter/lib/src/services/platform_channel.dart').
  Try correcting the name to the name of an existing method, or defining a method named 'setMockMessageHandler'.
  channel.setMockMessageHandler((dynamic message) async {
  ^^^^^^^^^^^^^^^^^^^^^
  /C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/video_player_platform_interface-2.1.0/lib/messages.dart:181:13: Error: The method 'setMockMessageHandler' isn't defined for the class 'BasicMessageChannel'.
• 'BasicMessageChannel' is from 'package:flutter/src/services/platform_channel.dart' ('/C:/src/flutter/packages/flutter/lib/src/services/platform_channel.dart').
  Try correcting the name to the name of an existing method, or defining a method named 'setMockMessageHandler'.
  channel.setMockMessageHandler((dynamic message) async {
  ^^^^^^^^^^^^^^^^^^^^^
  /C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/video_player_platform_interface-2.1.0/lib/messages.dart:191:13: Error: The method 'setMockMessageHandler' isn't defined for the class 'BasicMessageChannel'.
• 'BasicMessageChannel' is from 'package:flutter/src/services/platform_channel.dart' ('/C:/src/flutter/packages/flutter/lib/src/services/platform_channel.dart').
  Try correcting the name to the name of an existing method, or defining a method named 'setMockMessageHandler'.
  channel.setMockMessageHandler((dynamic message) async {
  ^^^^^^^^^^^^^^^^^^^^^
  /C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/video_player_platform_interface-2.1.0/lib/messages.dart:201:13: Error: The method 'setMockMessageHandler' isn't defined for the class 'BasicMessageChannel'.
• 'BasicMessageChannel' is from 'package:flutter/src/services/platform_channel.dart' ('/C:/src/flutter/packages/flutter/lib/src/services/platform_channel.dart').
  Try correcting the name to the name of an existing method, or defining a method named 'setMockMessageHandler'.
  channel.setMockMessageHandler((dynamic message) async {
  ^^^^^^^^^^^^^^^^^^^^^
  /C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/video_player_platform_interface-2.1.0/lib/messages.dart:211:13: Error: The method 'setMockMessageHandler' isn't defined for the class 'BasicMessageChannel'.
• 'BasicMessageChannel' is from 'package:flutter/src/services/platform_channel.dart' ('/C:/src/flutter/packages/flutter/lib/src/services/platform_channel.dart').
  Try correcting the name to the name of an existing method, or defining a method named 'setMockMessageHandler'.
  channel.setMockMessageHandler((dynamic message) async {
  ^^^^^^^^^^^^^^^^^^^^^
  /C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/video_player_platform_interface-2.1.0/lib/messages.dart:221:13: Error: The method 'setMockMessageHandler' isn't defined for the class 'BasicMessageChannel'.
• 'BasicMessageChannel' is from 'package:flutter/src/services/platform_channel.dart' ('/C:/src/flutter/packages/flutter/lib/src/services/platform_channel.dart').
  Try correcting the name to the name of an existing method, or defining a method named 'setMockMessageHandler'.
  channel.setMockMessageHandler((dynamic message) async {
  ^^^^^^^^^^^^^^^^^^^^^

FAILURE: Build failed with an exception.

• Where:
  Script 'C:\src\flutter\packages\flutter_tools\gradle\flutter.gradle' line: 1005

• What went wrong:
  Execution failed for task ':app:compileFlutterBuildDebug'.

Process 'command 'C:\src\flutter\bin\flutter.bat'' finished with non-zero exit value 1

• Try:
  Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.

• Get more help at https://help.gradle.org

BUILD FAILED in 58s
Exception: Gradle task assembleDebug failed with exit code 1

[notture]

我也是这种错误，求解决方法

[biostome]

me too!!