{"ast_node_type":"other","tokens":[{"end":64,"kind":"keyword","start":0,"text":"FieldsShape::Arbitrary"}]}
            FieldsShape::Arbitrary { ref memory_index, .. } => {
            FieldsShape::Union(_) | FieldsShape::Array { .. } => i,
                memory_index[FieldIdx::new(i)].try_into().unwrap()