src/vs/platform/configuration/common/configurationModels.ts/ConfigurationModel/rawConfiguration
class ConfigurationModel:	get rawConfiguration(): ConfigurationModel {
		if (!this._rawConfiguration) {
			if (this.raw?.length) {
				const rawConfigurationModels = this.raw.map(raw => {
					if (raw instanceof ConfigurationModel) {
						return raw;
					}
					const parser = new ConfigurationModelParser('');
					parser.parseRaw(raw);
					return parser.configurationModel;
				});
				this._rawConfiguration = rawConfigurationModels.reduce((previous, current) => current === previous ? current : previous.merge(current), rawConfigurationModels[0]);
			} else {
				// raw is same as current
				this._rawConfiguration = this;
			}
		}
		return this._rawConfiguration;
	}