syntax_data: {"ast_node_type":"other","tokens":[{"end":31,"kind":"keyword","start":0,"text":"ExprKind::VarRef"}]}
source_snippet:         ExprKind::VarRef { .. }
context_before:         // we dont permit let stmts so `VarRef` and `UpvarRef` cant happen
context_after:         | ExprKind::UpvarRef { .. }