src/vs/platform/configuration/common/configurationModels.ts/Configuration/compareAndUpdateWorkspaceConfiguration
class Configuration:	compareAndUpdateWorkspaceConfiguration(workspaceConfiguration: ConfigurationModel): IConfigurationChange {
		const { added, updated, removed, overrides } = compare(this.workspaceConfiguration, workspaceConfiguration);
		const keys = [...added, ...updated, ...removed];
		if (keys.length) {
			this.updateWorkspaceConfiguration(workspaceConfiguration);
		}
		return { keys, overrides };
	}