src/vs/platform/configuration/common/configurationModels.ts/AllKeysConfigurationChangeEvent/constructor
class AllKeysConfigurationChangeEvent:	constructor(configuration: Configuration, workspace: Workspace, source: ConfigurationTarget, sourceConfig: any) {
		super({ keys: configuration.allKeys(), overrides: [] }, undefined, configuration, workspace);
		this.source = source;
		this.sourceConfig = sourceConfig;
	}