syntax_data: {"ast_node_type":"other","tokens":[{"end":21,"kind":"keyword","start":0,"text":"}"}]}
source_snippet:                     }
context_before:                         field_names.filter_map(|n| fields_map.get(&n).cloned()).collect()
context_after:                     AdtExprBase::Base(FruInfo { base, field_types }) => {