getDevicePath

pub fn getDevicePath(self: *const DevicePath) ?uefi.DevicePath {
    inline for (@typeInfo(uefi.DevicePath).@"union".fields) |ufield| {
        const enum_value = std.meta.stringToEnum(uefi.DevicePath.Type, ufield.name);

        // Got the associated union type for self.type, now
        // we need to initialize it and its subtype
        if (self.type == enum_value) {
            const subtype = self.initSubtype(ufield.type);
            if (subtype) |sb| {
                // e.g. return .{ .hardware = .{ .pci = @ptrCast(...) } }
                return @unionInit(uefi.DevicePath, ufield.name, sb);
            }
        }
    }

    return null;
}