IFClite TypeScript API
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    Interface ReadXlsxOptions

    interface ReadXlsxOptions {
        columns?: readonly XlsxColumnSpec[];
        key?: string;
        sheet?: string;
    }
    Index
    columns?: readonly XlsxColumnSpec[]

    Optional column types; defaults to the header row, all string.

    key?: string
    sheet?: string

    Sheet name; defaults to the first (only) worksheet.