class Blob
+ def initialize locator
+ @locator = locator
+ end
+
+ def empty?
+ !!@locator.match(/^d41d8cd98f00b204e9800998ecf8427e(\+.*)?$/)
+ end
+
# In order to get a Blob from Keep, you have to prove either
# [a] you have recently written it to Keep yourself, or
# [b] apiserver has recently decided that you should be able to read it