src/vs/workbench/api/browser/mainThreadLabelService.ts/MainThreadLabelService/$registerResourceLabelFormatter
class MainThreadLabelService:	$registerResourceLabelFormatter(handle: number, formatter: ResourceLabelFormatter): void {
		// Dynamicily registered formatters should have priority over those contributed via package.json
		formatter.priority = true;
		const disposable = this._labelService.registerCachedFormatter(formatter);
		this._resourceLabelFormatters.set(handle, disposable);
	}