in src/main/java/com/google/cloud/solutions/bqremoteencryptionfn/BigQueryFnCallController.java [75:78]
private static CallMode identifyCallMode(Map<String, String> userContext) {
var callMode = userContext.get(CALL_MODE_KEY);
return callMode == null ? CallMode.DEIDENTIFY : CallMode.valueOf(callMode.toUpperCase());
}