src/vs/workbench/contrib/notebook/common/notebookCommon.ts/generateCellUri
	export function generateCellUri(notebook: URI, handle: number, scheme: string): URI {
		return notebook.with({
			scheme: scheme,
			fragment: `ch${handle.toString().padStart(7, '0')}${notebook.scheme !== Schemas.file ? notebook.scheme : ''}`
		});
	}