510     wtr: Option<W>,  field
1203         let mut wtr = WriterBuilder::new().from_writer(vec![]);  in one_record()  localVariable
1211         let mut wtr = WriterBuilder::new().from_writer(vec![]);  in one_string_record()  localVariable
1219         let mut wtr = WriterBuilder::new().from_writer(vec![]);  in one_byte_record()  localVariable
1227         let mut wtr = WriterBuilder::new().from_writer(vec![]);  in raw_one_byte_record()  localVariable
1235         let mut wtr = WriterBuilder::new().from_writer(vec![]);  in one_empty_record()  localVariable
1243         let mut wtr = WriterBuilder::new().from_writer(vec![]);  in raw_one_empty_record()  localVariable
1251         let mut wtr = WriterBuilder::new().from_writer(vec![]);  in two_empty_records()  localVariable
1260         let mut wtr = WriterBuilder::new().from_writer(vec![]);  in raw_two_empty_records()  localVariable
1269         let mut wtr = WriterBuilder::new().from_writer(vec![]);  in unequal_records_bad()  localVariable
1286         let mut wtr = WriterBuilder::new().from_writer(vec![]);  in raw_unequal_records_bad()  localVariable
1304         let mut wtr = WriterBuilder::new().flexible(true).from_writer(vec![]);  in unequal_records_ok()  localVariable
1312         let mut wtr = WriterBuilder::new().flexible(true).from_writer(vec![]);  in raw_unequal_records_ok()  localVariable
1344         let mut wtr =  in full_buffer_should_not_flush_underlying()  localVariable
1368         let mut wtr = WriterBuilder::new().from_writer(vec![]);  in serialize_with_headers()  localVariable
1382         let mut wtr =  in serialize_no_headers()  localVariable
1398             let mut wtr =  localVariable
1411         let mut wtr = WriterBuilder::new().from_writer(vec![]);  in serialize_tuple()  localVariable