def METHOD_NAME():
    argument_spec = dict(
        state=dict(default="present", choices=["present", "absent"]),
        name=dict(required=True),
        description=dict(required=False),
        subnets=dict(required=False, type="list", elements="str"),
    )
    global module
    global client
    module = AnsibleAWSModule(
        argument_spec=argument_spec,
        supports_check_mode=True,
    )
    state = module.params.get("state")
    name = module.params.get("name").lower()
    description = module.params.get("description")
    subnets = module.params.get("subnets")
    client = module.client("elasticache", retry_decorator=AWSRetry.jittered_backoff())
    subnet_group = get_subnet_group(name)
    changed = False
    if state == "present":
        if not subnet_group:
            result = create_subnet_group(name, description, subnets)
            changed |= result
        else:
            result = update_subnet_group(subnet_group, name, description, subnets)
            changed |= result
        subnet_group = get_subnet_group(name)
    else:
        if subnet_group:
            result = delete_subnet_group(name)
            changed |= result
        subnet_group = None
    module.exit_json(changed=changed, cache_subnet_group=subnet_group)