syntax_data: {"ast_node_type":"function","tokens":[{"end":86,"kind":"keyword","start":0,"text":"fn"}]}
source_snippet:     fn with_cached_task<T>(self, task: impl FnOnce() -> T) -> (T, Self::DepNodeIndex);
context_before:     fn get_tracked<T: Debug + Clone>(self, tracked: &Self::Tracked<T>) -> T;