syntax_data: {"ast_node_type":"other","tokens":[{"end":68,"kind":"keyword","start":0,"text":"///"}]}
source_snippet:     /// expression inside `bar!`; the call_site of the expression in
context_before:     /// `foo!()` invoked `bar!()` internally, and there was an
context_after:     /// the expansion would point to the `bar!` invocation; that