SheetXL - v0.8.0-beta.9+sites.210.e2d420901
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    interface AddOptions {
        sheetNames?: readonly string[];
        sources: string | readonly SourceEntry[];
    }
    Index
    sheetNames?: readonly string[]

    The source's sheet names, if known. A formula citing a sheet not listed here adds it.

    sources: string | readonly SourceEntry[]

    Where the source workbook is: a path or URL (C:\dir\Budget.xlsx, \\server\share\Budget.xlsx, https://host/Budget.xlsx, or a bare Budget.xlsx relative to this workbook), or the full (relType, target) entries a file would record.