@Override
    public List<WorkflowTask> fromProto(WorkflowTaskPb.WorkflowTask.WorkflowTaskList list) {
        return list.getTasksList().stream().map(this::fromProto).collect(Collectors.toList());
    }
Convert a WorkflowTaskList message wrapper into a {@link List} instance
with its contents.

@param list an instance of a ProtoBuf message
@return a list with the contents of the message
grpc/src/main/java/com/netflix/conductor/grpc/ProtoMapper.java