thirtyfour_sync is used at run time in 2 crates. It's used only as a dev dependency in 2 crates.

Depender (with downloads and own rev deps) thirtyfour_sync version
tdameritrade_rust ^0.27.1
otter-webdriver-tests ^0.27
12K sccache dev ^0.27
1 doc_item dev ^0.27.1