This would be usedful if you need to store the same password in different formats on different places. For instance we need to have a encrypted password in our application to access a third party application, but to configure the third party application it demands that the password is in md5.
To solve this, adding the possibility to have more than one field processor.
Also adding a optional property to processors to specify what variable to use for the result.
Processors specified with toVariable does not update the field's original value