Method get_or_insert

plugins/warp/src/cache.rs:180–192

(
        &self,
        function_id: &FunctionID,
        f: F,
    )

impl MatchedFunctionCache {
    pub fn get_or_insert<F>(
        &self,
        function_id: &FunctionID,
        f: F,
    ) -> Ref<'_, FunctionID, Option<Function>>
    where
        F: FnOnce() -> Option<Function>,
    {
        self.cache.get(function_id).unwrap_or_else(|| {
            self.cache.insert(*function_id, f());
            self.cache.get(function_id).unwrap()
        })
    }

    pub fn get(&self, function_id: &FunctionID) -> Option<Ref<'_, FunctionID, Option<Function>>> {
        self.cache.get(function_id)