Derive Hash for FileIDType

src/storage/file/id_type.rs

@@ -1,12 +1,14 @@
 use std::convert::{From, Into};
 use std::error::Error;
 use std::str::FromStr;
+use std::hash::Hash;
 
 #[derive(Debug)]
 #[derive(Clone)]
 #[derive(PartialEq)]
 #[derive(Eq)]
 // #[derive(Display)]
+#[derive(Hash)]
 pub enum FileIDType {
     UUID,
 }