{"ast_node_type":"other","tokens":[{"end":54,"kind":"keyword","start":0,"text":"default_fields:"}]}
    default_fields: Table<DefIndex, LazyValue<DefId>>,
    expn_that_defined: Table<DefIndex, LazyValue<ExpnId>>,
    params_in_repr: Table<DefIndex, LazyValue<DenseBitSet<u32>>>,