syntax_data: {"ast_node_type":"other","tokens":[{"end":93,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:     // --- but such sharing is known to bring some minor inconveniences without also bringing
context_before:     // --- It may be reasonable to share this part between expansions with the same definition,
context_after:     // --- noticeable perf improvements (PR #62898).