Excel JS display file paths of linked workbooks

Question

Is it possible to retrieve file paths of linked Excel workbooks using the Office JS API (Excel js)?

I can see a LinkedWorkbook property, however, the isNull value returns true and the getItems function returns undefined., so I can't iterate over the linked workbooks.

As you can see, I do have a linked workbook in the Excel sheet that I am currently working on:

await Excel.run(async (context) => { 
	context.workbook.load("linkedWorkbooks");
	await context.sync();
	const isNull = context.workbook.linkedWorkbooks.isNullObject;
	const items = context.workbook.linkedWorkbooks.items;
});