title: I got Too few positional arguments error flutter and I can't understand why?
body: <p>Hi everyone my app was work will before two to days today when I run my app it gives me that following error :
  /C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/modal_bottom_sheet-0.2.0+1/lib/src/bottom_sheet.dart:295:43: Error: Too few positional arguments: 1 required, 0 given.
  _velocityTracker = VelocityTracker();
  ^
  /C:/src/flutter/packages/flutter/lib/src/gestures/velocity_tracker.dart:152:3: Context: Found this candidate, but the arguments don't match.
  VelocityTracker(this.kind);
  ^^^^^^^^^^^^^^^
  /C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/animations-1.1.1/lib/src/fade_scale_transition.dart:148:29: Error: 'decelerateEasing' is imported from both 'package:flutter/src/material/curves.dart' and 'package:animations/src/utils/curves.dart'.
  ).chain(CurveTween(curve: decelerateEasing));
  ^^^^^^^^^^^^^^^^
  /C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/animations-1.1.1/lib/src/shared_axis_transition.dart:315:12: Error: 'decelerateEasing' is imported from both 'package:flutter/src/material/curves.dart' and 'package:animations/src/utils/curves.dart'.
  curve: decelerateEasing,
  ^^^^^^^^^^^^^^^^
  /C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/animations-1.1.1/lib/src/shared_axis_transition.dart:321:29: Error: 'standardEasing' is imported from both 'package:flutter/src/material/curves.dart' and 'package:animations/src/utils/curves.dart'.
  ).chain(CurveTween(curve: standardEasing));
  ^^^^^^^^^^^^^^
  /C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/animations-1.1.1/lib/src/shared_axis_transition.dart:326:29: Error: 'standardEasing' is imported from both 'package:flutter/src/material/curves.dart' and 'package:animations/src/utils/curves.dart'.
  ).chain(CurveTween(curve: standardEasing));
  ^^^^^^^^^^^^^^
  /C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/animations-1.1.1/lib/src/shared_axis_transition.dart:335:35: Error: 'standardEasing' is imported from both 'package:flutter/src/material/curves.dart' and 'package:animations/src/utils/curves.dart'.
  ).chain(CurveTween(curve: standardEasing));
  ^^^^^^^^^^^^^^
  /C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/animations-1.1.1/lib/src/shared_axis_transition.dart:355:35: Error: 'standardEasing' is imported from both 'package:flutter/src/material/curves.dart' and 'package:animations/src/utils/curves.dart'.
  ).chain(CurveTween(curve: standardEasing));
  ^^^^^^^^^^^^^^
  /C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/animations-1.1.1/lib/src/shared_axis_transition.dart:402:12: Error: 'accelerateEasing' is imported from both 'package:flutter/src/material/curves.dart' and 'package:animations/src/utils/curves.dart'.
  curve: accelerateEasing,
  ^^^^^^^^^^^^^^^^
  /C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/animations-1.1.1/lib/src/shared_axis_transition.dart:408:29: Error: 'standardEasing' is imported from both 'package:flutter/src/material/curves.dart' and 'package:animations/src/utils/curves.dart'.
  ).chain(CurveTween(curve: standardEasing));
  ^^^^^^^^^^^^^^
  /C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/animations-1.1.1/lib/src/shared_axis_transition.dart:413:29: Error: 'standardEasing' is imported from both 'package:flutter/src/material/curves.dart' and 'package:animations/src/utils/curves.dart'.
  ).chain(CurveTween(curve: standardEasing));
  ^^^^^^^^^^^^^^
  /C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/animations-1.1.1/lib/src/shared_axis_transition.dart:422:35: Error: 'standardEasing' is imported from both 'package:flutter/src/material/curves.dart' and 'package:animations/src/utils/curves.dart'.
  ).chain(CurveTween(curve: standardEasing));
  ^^^^^^^^^^^^^^
  /C:/src/flutter/.pub-cache/hosted/pub.dartlang.org/animations-1.1.1/lib/src/shared_axis_transition.dart:445:35: Error: 'standardEasing' is imported from both 'package:flutter/src/material/curves.dart' and 'package:animations/src/utils/curves.dart'.
  ).chain(CurveTween(curve: standardEasing));
  ^^^^^^^^^^^^^^</p>
  <p>FAILURE: Build failed with an exception.</p>
  <ul>
  <li><p>Where:
  Script 'C:\src\flutter\packages\flutter_tools\gradle\flutter.gradle' line: 904</p>
  </li>
  <li><p>What went wrong:
  Execution failed for task ':app:compileFlutterBuildDebug'.</p>
  </li>
  </ul>
  <blockquote>
  <p>Process 'command 'C:\src\flutter\bin\flutter.bat'' finished with non-zero exit value 1</p>
  </blockquote>
  <ul>
  <li><p>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.</p>
  </li>
  <li><p>Get more help at <a href="https://help.gradle.org" rel="nofollow noreferrer">https://help.gradle.org</a></p>
  </li>
  </ul>
  <p>BUILD FAILED in 27s
  Exception: Gradle task assembleDebug failed with exit code 1</p>
  <p>I don't understand why this error is appear and how I fixed It .
  any suggestions will appreciated</p>