src/vs/editor/common/services/textResourceConfigurationService.ts/TextResourceConfigurationService/getValue
class TextResourceConfigurationService:	getValue<T>(resource: URI | undefined, arg2?: any, arg3?: any): T {
		if (typeof arg3 === 'string') {
			return this._getValue(resource, Position.isIPosition(arg2) ? arg2 : null, arg3);
		}
		return this._getValue(resource, null, typeof arg2 === 'string' ? arg2 : undefined);
	}