{"ast_node_type":"other","tokens":[{"end":77,"kind":"keyword","start":0,"text":"//"}]}
                // parameter's pattern so that `HirId`s are densely assigned.
                // Construct the `let <pat> = __argN;` statement. We re-use the original
                let pattern_expr = self.expr_ident(desugared_span, ident, move_id);