---
lang: en
title: 'API docs: openapi-spec-builder.builderbase._spec'
keywords: LoopBack 4.0, LoopBack 4, Node.js, TypeScript, OpenAPI
sidebar: lb4_sidebar
editurl: https://github.com/strongloop/loopback-next/tree/master/packages/openapi-spec-builder
permalink: /doc/en/lb4/apidocs.openapi-spec-builder.builderbase._spec.html
---

<!-- Do not edit this file. It is automatically generated by API Documenter. -->

[Home](./index.md) &gt; [@loopback/openapi-spec-builder](./openapi-spec-builder.md) &gt; [BuilderBase](./openapi-spec-builder.builderbase.md) &gt; [\_spec](./openapi-spec-builder.builderbase._spec.md)

## BuilderBase.\_spec property

<b>Signature:</b>

```typescript
protected _spec: T;
```