pub fn has_chip_features(&self) -> bool {
        use Package::*;

        matches!(
            self,
            EspBacktrace
                | EspHal
                | EspHalEmbassy
                | EspIeee802154
                | EspLpHal
                | EspPrintln
                | EspStorage
                | EspWifi
        )
    }
Does the package have chip-specific cargo features?
xtask/src/lib.rs