Cargo Features

BridgeTree has no features set by default.

[dependencies]
bridgetree = { version = "0.4.0", features = ["test-dependencies"] }
test-dependencies = proptest

Features from optional dependencies

In crates that don't use the dep: syntax, optional dependencies automatically become Cargo features. These features may have been created by mistake, and this functionality may be removed in the future.

proptest test-dependencies?