syntax_data: {"ast_node_type":"other","tokens":[{"end":51,"kind":"keyword","start":0,"text":"#[instrument(skip(self),"}]}
source_snippet:     #[instrument(skip(self), level = "debug", ret)]
context_before:     /// Expands the given impl trait type, stopping if the type is recursive.
context_after:     pub fn try_expand_impl_trait_type(