Function abstutil::serde::serialize_btreemap

pub fn serialize_btreemap<S: Serializer, K: Serialize, V: Serialize>(
    map: &BTreeMap<K, V>, 
    s: S
) -> Result<S::Ok, S::Error>

Serializes a BTreeMap as a list of tuples. Necessary when the keys are structs; see https://github.com/serde-rs/json/issues/402.