presto-session-property-managers/src/main/java/io/prestosql/plugin/session/SessionPropertyConfigurationManagerPlugin.java/SessionPropertyConfigurationManagerPlugin/getSessionPropertyConfigurationManagerFactories
class SessionPropertyConfigurationManagerPlugin:    @Override
    public Iterable<SessionPropertyConfigurationManagerFactory> getSessionPropertyConfigurationManagerFactories()
    {
        return ImmutableList.of(
                new FileSessionPropertyManagerFactory(),
                new DbSessionPropertyManagerFactory());
    }