code: func WithVolume(name string) func(*TestContainerConfig) {
  	return func(c *TestContainerConfig) {
  		if c.Config.Volumes == nil {
  			c.Config.Volumes = map[string]struct{}{}
  		}
  		c.Config.Volumes[name] = struct{}{}
  	}
  }
docs: // WithVolume sets the volume of the container