---
lang: en
title: 'API docs: metadata.parameterdecoratorfactory.mergewithown'
keywords: LoopBack 4.0, LoopBack 4
sidebar: lb4_sidebar
editurl: https://github.com/strongloop/loopback-next/tree/master/packages/metadata
permalink: /doc/en/lb4/apidocs.metadata.parameterdecoratorfactory.mergewithown.html
---

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[Home](./index.md) &gt; [@loopback/metadata](./metadata.md) &gt; [ParameterDecoratorFactory](./metadata.parameterdecoratorfactory.md) &gt; [mergeWithOwn](./metadata.parameterdecoratorfactory.mergewithown.md)

## ParameterDecoratorFactory.mergeWithOwn() method

<b>Signature:</b>

```typescript
protected mergeWithOwn(ownMetadata: MetadataMap<T[]>, target: Object, methodName?: string, parameterIndex?: TypedPropertyDescriptor<any> | number): MetadataMap<T[]>;
```

## Parameters

|  Parameter | Type | Description |
|  --- | --- | --- |
|  ownMetadata | <code>MetadataMap&lt;T[]&gt;</code> |  |
|  target | <code>Object</code> |  |
|  methodName | <code>string</code> |  |
|  parameterIndex | <code>TypedPropertyDescriptor&lt;any&gt; &#124; number</code> |  |

<b>Returns:</b>

`MetadataMap<T[]>`