code: func (c *Corpus) EnumerateBlobMeta(fn func(camtypes.BlobMeta) bool) {
  	for _, bm := range c.blobs {
  		if !fn(*bm) {
  			return
  		}
  	}
  }
docs: // EnumerateBlobMeta calls fn for all known meta blobs in an undefined
  // order.
  // If fn returns false, iteration ends.