syntax_data: {"ast_node_type":"other","tokens":[{"end":90,"kind":"keyword","start":0,"text":"(ty::ValTreeKind::Branch(_),"}]}
source_snippet:             (ty::ValTreeKind::Branch(_), ty::Array(..) | ty::Tuple(..) | ty::Adt(..)) => {
context_before:             // Aggregates, printed as array/tuple/struct/variant construction syntax.
context_after:                 let contents = self.tcx().destructure_const(ty::Const::new_value(