src/vs/workbench/services/configurationResolver/browser/baseConfigurationResolverService.ts/BaseConfigurationResolverService/updateMapping
class BaseConfigurationResolverService:	private updateMapping(newMapping: IStringDictionary<string> | undefined, fullMapping: Map<string, string>): boolean {
		if (!newMapping) {
			return false;
		}
		for (const [key, value] of Object.entries(newMapping)) {
			fullMapping.set(key, value);
		}
		return true;
	}