either_n is used at run time in 13 crates (of which 2 optionally). It is a direct run-time dependency in 3 crates. It's used only as a dev dependency in 1 crate.

Depender (with downloads and own rev deps) either_n version
380 4 syn-helpers ^0.2.0
170 1 enum-variants-strings-derive ^0.2.0
1 domafic optional ^0.2.0