pub fn biodome<U: From<T>, T: TryFromEnv<U>>(key: &str, default: T) -> Uwhere
<T as TryFromEnv<U>>::Error: Debug,Expand description
Read the env var “key”, and convert to type T. If the env var has not been set, “default” will be used. If the env var (or the default value) fail to parse correctly to type T, panic.