syntax_data: {"ast_node_type":"variable","tokens":[{"end":74,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:                 let data = self.confirm_fn_pointer_candidate(obligation)?;
context_before:             FnPointerCandidate => {
context_after:                 ImplSource::Builtin(BuiltinImplSource::Misc, data)