printUsage method
Prints the usage information for this command.
This is called internally by run and can be overridden by subclasses to control how output is displayed or integrate with a logging system.
Implementation
@override
void printUsage() => console.info(
'$description\n\n'
'Usage: $invocation\n\n'
'--check Exit with code 1 if the catalog or sorting would change a '
'pubspec,\n'
' without changing anything or getting dependencies. For CI.\n\n'
'Every other option is passed to "dart pub get". Run "dart pub get '
'--help" to see them.',
);