syntax_data: {"ast_node_type":"other","tokens":[{"end":30,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:     // also set dropline here:
context_before:     // FIXME: When move insert_clean_drop + elaborate_coroutine_drops before async drops expand,
context_after:     // let dropline = if has_async_drops { Some(return_block) } else { None };