syntax_data: {"ast_node_type":"other","tokens":[{"end":86,"kind":"keyword","start":0,"text":"self.check_binding_is_irrefutable(pat,"}]}
source_snippet:             self.check_binding_is_irrefutable(pat, "local binding", scrut, Some(span))
context_before:         if let LetSource::PlainLet = self.let_source {
context_after:         } else {