Cargo Features

KdTree has no features set by default.

[dependencies]
kdtree = { version = "0.7.0", features = ["serialize"] }
serialize = serde, serde_derive

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.

serde serialize?
serde_derive serialize?