510     wtr: Option<W>,  field
1200         let mut wtr = WriterBuilder::new().from_writer(vec![]);  in one_record()  localVariable
1208         let mut wtr = WriterBuilder::new().from_writer(vec![]);  in one_string_record()  localVariable
1216         let mut wtr = WriterBuilder::new().from_writer(vec![]);  in one_byte_record()  localVariable
1224         let mut wtr = WriterBuilder::new().from_writer(vec![]);  in raw_one_byte_record()  localVariable
1232         let mut wtr = WriterBuilder::new().from_writer(vec![]);  in one_empty_record()  localVariable
1240         let mut wtr = WriterBuilder::new().from_writer(vec![]);  in raw_one_empty_record()  localVariable
1248         let mut wtr = WriterBuilder::new().from_writer(vec![]);  in two_empty_records()  localVariable
1257         let mut wtr = WriterBuilder::new().from_writer(vec![]);  in raw_two_empty_records()  localVariable
1266         let mut wtr = WriterBuilder::new().from_writer(vec![]);  in unequal_records_bad()  localVariable
1283         let mut wtr = WriterBuilder::new().from_writer(vec![]);  in raw_unequal_records_bad()  localVariable
1301         let mut wtr = WriterBuilder::new().flexible(true).from_writer(vec![]);  in unequal_records_ok()  localVariable
1309         let mut wtr = WriterBuilder::new().flexible(true).from_writer(vec![]);  in raw_unequal_records_ok()  localVariable
1341         let mut wtr =  in full_buffer_should_not_flush_underlying()  localVariable
1365         let mut wtr = WriterBuilder::new().from_writer(vec![]);  in serialize_with_headers()  localVariable
1379         let mut wtr =  in serialize_no_headers()  localVariable
1395             let mut wtr =  localVariable
1408         let mut wtr = WriterBuilder::new().from_writer(vec![]);  in serialize_tuple()  localVariable