syntax_data: {"ast_node_type":"other","tokens":[{"end":65,"kind":"keyword","start":0,"text":"return"}]}
source_snippet:                     return Some((fn_def_id.to_def_id(), vec![]));
context_before:                 let Some(output) = tcx.hir_get_fn_output(fn_def_id) else {
context_after:                 };