def add_cache(GatewayARN=None, DiskIds=None):
    """
    Configures one or more gateway local disks as cache for a gateway. This operation is only supported in the cached volume, tape and file gateway architectures (see Storage Gateway Concepts ).
    In the request, you specify the gateway Amazon Resource Name (ARN) to which you want to add cache, and one or more disk IDs that you want to configure as cache.
    See also: AWS API Documentation
    
    Examples
    The following example shows a request that activates a gateway-stored volume.
    Expected Output:
    
    :example: response = client.add_cache(
        GatewayARN='string',
        DiskIds=[
            'string',
        ]
    )
    
    
    :type GatewayARN: string
    :param GatewayARN: [REQUIRED]
            The Amazon Resource Name (ARN) of the gateway. Use the ListGateways operation to return a list of gateways for your account and region.
            

    :type DiskIds: list
    :param DiskIds: [REQUIRED]
            (string) --
            

    :rtype: dict
    :return: {
        'GatewayARN': 'string'
    }
    
    
    """
    pass
