in src/main/java/com/google/cloud/solutions/bqremoteencryptionfn/fns/AesFn.java [86:92]
public AesFn(
String keyString, AesKeyType keyType, String cipherTransformType, String ivParameterBase64) {
this.keyString = keyString;
this.keyType = keyType;
this.cipherTransformType = cipherTransformType;
this.ivParameterBase64 = ivParameterBase64;
}