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