getSpawnedProcessById method
The getSpawnedProcessById RPC is used to retrieve information about a process
spawned by dart:io from a given isolate.
Implementation
Future<SpawnedProcess> getSpawnedProcessById(String isolateId, int id) =>
    _callHelper(
      'ext.dart.io.getSpawnedProcessById',
      isolateId,
      args: {
        'id': id,
      },
    );