syntax_data: {"ast_node_type":"variable","tokens":[{"end":59,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:                 let kind = ExprKind::Adt(Box::new(AdtExpr {
context_before:                 let args = self.tcx.mk_args(&[new_pin_target.into()]);
context_after:                     adt_def: self.tcx.adt_def(pin_did),