syntax_data: {"ast_node_type":"other","tokens":[{"end":25,"kind":"keyword","start":0,"text":"Ok(vtbl)"}]}
source_snippet:         Ok(vtbl) => vtbl,
context_before:     let vtbl = match tcx.codegen_select_candidate(input) {
context_after:         Err(CodegenObligationError::Ambiguity | CodegenObligationError::Unimplemented) => {