public List<LocalLogManager> logManagers() {
        return logManagers;
    }
Append some records to the log. This method is meant to be called before the
controllers are started, to simulate a pre-existing metadata log.

@param records   The records to be appended. Will be added in a single batch.
metadata/src/test/java/org/apache/kafka/metalog/LocalLogManagerTestEnv.java