syntax_data: {"ast_node_type":"variable","tokens":[{"end":53,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:         let args = self.typeck_results.node_args(id);
context_before:         // Lower the named constant to a THIR pattern.
context_after:         // FIXME(mgca): we will need to special case IACs here to have type system compatible