presto-verifier/src/main/java/io/prestosql/verifier/VerifierConfig.java/VerifierConfig/setEventLogFile
class VerifierConfig:    @ConfigDescription("The file to log events to. Used with event-client=file")
    @Config("event-log-file")
    public VerifierConfig setEventLogFile(String eventLogFile)
    {
        this.eventLogFile = eventLogFile;
        return this;
    }