tracks/rust/exercises/etl/src/lib.rs in trackler-2.2.1.173 vs tracks/rust/exercises/etl/src/lib.rs in trackler-2.2.1.174

@@ -1,3 +1,7 @@
+use std::collections::BTreeMap;
 
+pub fn transform(h: &BTreeMap<i32, Vec<char>>) -> BTreeMap<char, i32> {
+    unimplemented!("How will you transform the tree {:?}?", h)
+}