It's used only as a dev dependency in 6 crates.

Depender (with downloads and own rev deps) yewlish-testing-tools version
1.6K yewlish-fetch dev ^1.2.1
370 4 yewlish-attr-passer dev ^1.2.1
360 4 yewlish-utils dev ^1.2.1
350 yewlish-switch dev ^1.2.1
340 yewlish-checkbox dev ^1.2.1
340 yewlish-radio-group dev ^1.2.1