OfficeExtension.ClientResult class   
Contains the result for methods that return primitive types. The object's value property is retrieved from the document after context.sync() is invoked.
Remarks
Examples
await Excel.run(async (context) => {
    // Get the count of worksheets in the Excel workbook.
    const workbook = context.workbook;
    let countResult: OfficeExtension.ClientResult<number> = workbook.worksheets.getCount();
    // Sync to populate the countResult object.
    await context.sync();
    // Log the count using the value parameter.
    console.log(countResult.value);
});
	Properties
| value | The value of the result that is retrieved from the document after   | 
Property Details
value
The value of the result that is retrieved from the document after context.sync() is invoked.
value: T;
				Property Value
T