Async API to test connection between source and target replication group.
See https://www.paws-r-sdk.com/docs/elasticache_test_migration/ for full documentation.
elasticache_test_migration(ReplicationGroupId, CustomerNodeEndpointList)
[required] The ID of the replication group to which data is to be migrated.
[required] List of endpoints from which data should be migrated. List should have only one element.