excelMimeType top-level property
Implementation
List<String> excelMimeType = [
"application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
"application/vnd.ms-excel",
"application/msexcel",
"application/x-msexcel",
"application/x-ms-excel",
"application/x-excel",
"application/x-dos_ms_excel",
"application/xls",
];