src/vs/workbench/services/preferences/common/preferencesModels.ts/DefaultSettingsEditorModel/copySetting
class DefaultSettingsEditorModel:	private copySetting(setting: ISetting): ISetting {
		return {
			description: setting.description,
			scope: setting.scope,
			type: setting.type,
			enum: setting.enum,
			enumDescriptions: setting.enumDescriptions,
			key: setting.key,
			value: setting.value,
			range: setting.range,
			overrides: [],
			overrideOf: setting.overrideOf,
			tags: setting.tags,
			deprecationMessage: setting.deprecationMessage,
			keyRange: nullRange,
			valueRange: nullRange,
			descriptionIsMarkdown: undefined,
			descriptionRanges: []
		};
	}