presto-cassandra/src/main/java/io/prestosql/plugin/cassandra/NativeCassandraSession.java/NativeCassandraSession/getReplicas
class NativeCassandraSession:    @Override
    public Set<Host> getReplicas(String caseSensitiveSchemaName, ByteBuffer partitionKey)
    {
        requireNonNull(caseSensitiveSchemaName, "keyspace is null");
        requireNonNull(partitionKey, "partitionKey is null");
        return executeWithSession(session ->
                session.getCluster().getMetadata().getReplicas(validSchemaName(caseSensitiveSchemaName), partitionKey));
    }