src/vs/platform/configuration/common/configurationService.ts/ConfigurationService/onDidPolicyConfigurationChange
class ConfigurationService:	private onDidPolicyConfigurationChange(policyConfiguration: ConfigurationModel): void {
		const previous = this.configuration.toData();
		const change = this.configuration.compareAndUpdatePolicyConfiguration(policyConfiguration);
		this.trigger(change, previous, ConfigurationTarget.DEFAULT);
	}