startAndReadAsString method
Implementation
Future<String> startAndReadAsString(String executable,
{Iterable<String> arguments = const [],
Encoding encoding: utf8,
List<int> acceptedExitCodes: const [0]}) async {
var p = await start(executable, arguments: arguments);
await p.expectExitCode(acceptedExitCodes);
return await p.stdout.readAsString(encoding: encoding);
}