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;
		}
		forEach(newMapping, (entry) => {
			fullMapping.set(entry.key, entry.value);
		});
		return true;
	}