in dp_check/dp_check.go [1138:1145]
func maybeOverrideFlags() {
const spannerSuffix = "spanner.googleapis.com"
const bigtableSuffix = "bigtable.googleapis.com"
if strings.HasSuffix(*service, spannerSuffix) || strings.HasSuffix(*service, bigtableSuffix) {
infoLog.Printf("overriding flag --xds_expect_fallback_configured to true because --service ends with %s or %s, previous setting: %v", spannerSuffix, bigtableSuffix, *xdsExpectFallbackConfigured)
*xdsExpectFallbackConfigured = true
}
}