817     fn de_headers<D: DeserializeOwned>(  in de_headers()  function
840             de_headers(&["x", "y", "z"], &["hi", "42", "1.3"]).unwrap();  in with_header()
853         assert!(de_headers::<Foo>(  in with_header_unknown()
868         assert!(de_headers::<Foo>(&["y", "z"], &["42", "1.3"],).is_err());  in with_header_missing()
880         let got: Foo = de_headers(&["y", "z"], &["42", "1.3"]).unwrap();  in with_header_missing_ok()
893         let got = de_headers::<Foo>(&["y", "z"], &[]);  in with_header_no_fields()
906         let got = de_headers::<Foo>(&[], &[]);  in with_header_empty()
918         let got = de_headers::<Foo>(&[], &[]);  in with_header_empty_ok()
921         let got = de_headers::<Bar>(&[], &[]);  in with_header_empty_ok()
924         let got = de_headers::<()>(&[], &[]);  in with_header_empty_ok()
1046             de_headers(&["a", "b", "c"], &["1", "5", "10"]).unwrap();  in map_headers()
1087         let got: Row = de_headers(&["label", "x"], &["bar", "5"]).unwrap();  in enum_label_simple_tagged()
1110             de_headers(&["x", "y", "z"], &["true", "null", "1"]).unwrap();  in enum_untagged()
1131             de_headers(&["a", "b", "c"], &["", "foo", "5"]).unwrap();  in option_empty_field()
1148             de_headers(&["a", "b", "c"], &["xyz", "", "5"]).unwrap();  in option_invalid_field()