interface xlsx.WorkBookimport { type xlsx } from "https://deno.land/x/flat@0.0.15/mod.ts"; const { WorkBook } = xlsx; Workbook Object PropertiesSheets: { [sheet: string]: WorkSheet; }A dictionary of the worksheets in the workbook. Use SheetNames to reference these. SheetNames: string[]Ordered list of the sheet names in the workbook optionalProps: FullPropertiesStandard workbook Properties optionalCustprops: objectCustom workbook Properties optionalWorkbook: WBPropsoptionalvbaraw: any