Function crates 

pub fn crates(
    root: &Path,
    package: &str,
    triple: &str,
    features: &[String],
) -> Result<Vec<Work>, String>

The crates the package package of the workspace at root compiles in for triple with features (its own) turned on: its normal dependencies, all the way down, by cargo metadata. Dev- and build-dependencies don’t ship; the game’s own crates (workspace members outside the engine’s repository) are the game’s work, not a notice.