syntax_data: {"ast_node_type":"other","tokens":[{"end":62,"kind":"keyword","start":0,"text":"print_indented!(self,"}]}
source_snippet:                 print_indented!(self, "Closure {", depth_lvl);
context_before:             Closure(closure_expr) => {
context_after:                 print_indented!(self, "closure_expr:", depth_lvl + 1);