- TIBCO BusinessEvents®
- Standard
- Collections
- Map

# Collections.Map.createMapWithId()

## Signature

`Object createMapWithId ( String mapId )`

## Domain

ACTION

## Description

Create and return instance of user specified Map implementation for the given mapID. If the map already exists, return the existing Map.

## Parameters

Name | Type | Description
--- | --- | ---
`className` | `String` | Specify the className that implements the Map interface
`mapId` | `String` | The String ID of the map to create

## Returns

Type | Description
--- | ---
`Object` | Instance of user specified Map implementation

## Cautions

none