Check to see if an ElastiCache subnet group exists.

    Example:

    .. code-block:: bash

        salt myminion boto3_elasticache.cache_subnet_group_exists my-subnet-group

def cache_subnet_group_exists(name, region=None, key=None, keyid=None, profile=None):
    '''
    Check to see if an ElastiCache subnet group exists.

    Example:

    .. code-block:: bash

        salt myminion boto3_elasticache.cache_subnet_group_exists my-subnet-group
    '''
    return bool(describe_cache_subnet_groups(name=name, region=region, key=key, keyid=keyid, profile=profile))