code: func Client(c *sqs.SQS) broker.Option {
  	return func(o *broker.Options) {
  		if o.Context == nil {
  			o.Context = context.Background()
  		}
  		o.Context = context.WithValue(o.Context, sqsClientKey{}, c)
  	}
  }
docs: // Client receives an instantiated instance of an SQS client which is used instead of initialising a new client