syntax_data: {"ast_node_type":"variable","tokens":[{"end":60,"kind":"keyword","start":0,"text":"if"}]}
source_snippet:             if let ExprKind::Deref { arg } = arg_node.kind {
context_before:             // FIXME(generic_const_exprs): Verify/explain why this is sound
context_after:                 recurse_build(tcx, body, arg, root_span)?