syntax_data: {"ast_node_type":"other","tokens":[{"end":31,"kind":"keyword","start":0,"text":"///"}]}
source_snippet:     /// on a best-effort basis.
context_before:     /// span in the context of the block span is found. The trailing semicolon is included
context_after:     pub fn stmt_span(&self, stmt_span: Span, block_span: Span) -> Span {