src/vs/platform/configuration/common/configurationModels.ts/ConfigurationInspectValue/userInspectValue
class ConfigurationInspectValue:	private get userInspectValue(): IInspectValue<V> {
		if (!this._userInspectValue) {
			this._userInspectValue = this.userConfiguration.inspect<V>(this.key, this.overrides.overrideIdentifier);
		}
		return this._userInspectValue;
	}