code: func (c *Conn) ChangeImage(image *Image, args ...string) error {
  	callArgs := append([]string{"ImageID", itoa64(image.ID)}, args...)
  	return c.do("smugmug.images.changeSettings", nil, callArgs...)
  }
docs: // ChangeImage changes an image's settings.
  // The argument list is a sequence of key, value pairs.
  // The keys are the names of ImageInfo struct fields,
  // and the values are string values.  For a boolean field,
  // use "0" for false and "1" for true.
  //
  // Example:
  //	c.ChangeImage(a, "Caption", "me!", "Hidden", "0")
  //