pub fn from_binary_file<K: AsRef<std::path::Path>>(file: K) -> Self {
        use std::fs::read;
        let tmp = file.as_ref().to_path_buf();
        Self::dynamic(move || Ok(T::from(read(&tmp)?)))
    }
Variable which dynamically resolves to the value of a binary file.
rusoto/credential/src/variable.rs