syntax_data: {"ast_node_type":"other","tokens":[{"end":46,"kind":"keyword","start":0,"text":"if_then_scope:"}]}
source_snippet:                 if_then_scope: region::Scope {
context_before:             hir::ExprKind::If(cond, then, else_opt) => ExprKind::If {
context_after:                     local_id: then.hir_id.local_id,