Retainer is used at run time in 5 crates. It's used only as a dev dependency in 1 crate.

Depender (with downloads and own rev deps) Retainer version
270 rencfs ^0.3.0
werkbank ^0.3.0
force-rss ^0.3
kapiti ^0.3
fast42 ^0.3
13K 2 ssh-agent-lib dev ^0.3.0