syntax_data: {"ast_node_type":"other","tokens":[{"end":44,"kind":"keyword","start":0,"text":"AdtExprBase::Base(ref"}]}
source_snippet:             AdtExprBase::Base(ref base) => {
context_before:         match adt_expr.base {
context_after:                 print_indented!(self, "base:", depth_lvl + 1);