SheetXL - v0.8.0-beta.9+sites.210.e2d420901
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    Type Alias WorkbookLoadState

    WorkbookLoadState:
        | { status: "loading" }
        | { status: "loaded"; workbook: IWorkbook }
        | { error: unknown; status: "error" }

    The workbook-resolution lifecycle state, as read from IStudioAttributes.getWorkbookState.

    This is the resolution layer — turning a source (StudioProps.workbook given as read options / a promise) into an IWorkbook. error is also surfaced via StudioProps.onDocumentError and the error panel. The grid's first-paint is a separate, later event (StudioProps.onWorkbookLoad).