Method insert

src/adapter/src/catalog/apply.rs:2766–2768

(&mut self, key: K, value: V)

impl<K: Ord, V> MutableMap<K, V> for BTreeMap<K, V> {
    fn insert(&mut self, key: K, value: V) -> Option<V> {
        BTreeMap::insert(self, key, value)
    }
    fn remove(&mut self, key: &K) -> Option<V> {
        BTreeMap::remove(self, key)
    }