presto-main/src/main/java/io/prestosql/sql/SqlEnvironmentConfig.java/SqlEnvironmentConfig/setForcedSessionTimeZone
class SqlEnvironmentConfig:    @Config("sql.forced-session-time-zone")
    @ConfigDescription("User session time zone overriding value sent by client")
    public SqlEnvironmentConfig setForcedSessionTimeZone(@Nullable String timeZoneId)
    {
        this.forcedSessionTimeZone = Optional.ofNullable(timeZoneId)
                .map(TimeZoneKey::getTimeZoneKey);
        return this;
    }