syntax_data: {"ast_node_type":"other","tokens":[{"end":93,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:             // Walk over the inputs and outputs manually in order to get good spans for them.
context_before:             let ty_sig = tcx.fn_sig(item).instantiate_identity();
context_after:             try_visit!(visitor.visit(hir_sig.output.span(), ty_sig.output()));