It's used only as a dev dependency in 5 crates.

Depender (with downloads and own rev deps) debugger_test_parser version
12.6M 1612 smallvec dev ^0.1.0
9.1M 146 tinyvec dev ^0.1
1.7M 190 widestring dev ^0.1
1.7K 4 debugger_test dev ^0.1.0
150 supply-chain-trust-example-crate-000085 dev ^0.1