Constant cargo::core::features::STABILIZED_PACKAGE_FEATURES

const STABILIZED_PACKAGE_FEATURES: &str = "Enhanced feature flag behavior is now \
    available in virtual workspaces, and `member/feature-name` syntax is also \
    always available. Other extensions require setting `resolver = \"2\"` in \
    Cargo.toml.\n\
    See https://doc.rust-lang.org/nightly/cargo/reference/features.html#resolver-version-2-command-line-flags \
    for more information.";