syntax_data: {"ast_node_type":"other","tokens":[{"end":63,"kind":"keyword","start":0,"text":"print_indented!(self,"}]}
source_snippet:                 print_indented!(self, "UpvarRef {", depth_lvl);
context_before:             UpvarRef { closure_def_id, var_hir_id } => {
context_after:                 print_indented!(