src/vs/editor/common/config/editorOptions.ts/EditorStringOption/constructor
class EditorStringOption:	constructor(id: K, name: PossibleKeyName<string>, defaultValue: string, schema: IConfigurationPropertySchema | undefined = undefined) {
		if (typeof schema !== 'undefined') {
			schema.type = 'string';
			schema.default = defaultValue;
		}
		super(id, name, defaultValue, schema);
	}