according to

https://github.com/jenkinsci/token-macro-plugin/blob/master/src/main/java/org/jenkinsci/plugins/tokenmacro/Tokenizer.java#L72

one might think that "$$FOO" expands to "$FOO" ( where $$ is a literal).
… but it doesn't, at least not in the cloud foundry plugin.

>ERROR: Could not parse token macro: Unrecognized macro 'FOO' in '$FOO'

token macro 1.10, cloudfoundry 1.4.2 ( built from git)