syntax_data: {"ast_node_type":"function","tokens":[{"end":82,"kind":"keyword","start":0,"text":"fn"}]}
source_snippet:     fn print_closure_expr(&mut self, expr: &ClosureExpr<'tcx>, depth_lvl: usize) {
context_after:         let ClosureExpr { closure_id, args, upvars, movability, fake_reads } = expr;