After creating a Service Delegate or Message Delegate, you might want to
retrieve data from or store data in the BPMN process variables.
You can achieve this either through the BPMN process execution or via the Variables class.
It is very much recommended you use the latter method.
The Variables class provides lots of utility methods to read or write certain types
of BPMN process variables. If for some reason you need to fall back on the BPMN process execution
to solve your problem, we would like to learn how the current API of the Variables class is limiting you. Contact us, and we might turn it into a feature request (Contribute).