/Users/JerryChen/flutterDev/flutter/bin/flutter --no-color packages get
Running "flutter packages get" in example...
The current Dart SDK version is 2.1.0-dev.0.0.flutter-be6309690f.
Because flutter_speed_dial_example depends on flutter_speed_dial from path which requires SDK version >=1.19.0 <2.0.0, version solving failed.
pub get failed (1)
Process finished with exit code 1
/Users/JerryChen/flutterDev/flutter/bin/flutter --no-color packages get Running "flutter packages get" in example... The current Dart SDK version is 2.1.0-dev.0.0.flutter-be6309690f.
Because flutter_speed_dial_example depends on flutter_speed_dial from path which requires SDK version >=1.19.0 <2.0.0, version solving failed. pub get failed (1) Process finished with exit code 1