System.WorkflowContext does not exist.

Hi,  I am trying to replicate my existing employee onboarding app(using workflow) from 9.0.5 to 9.18.0. I have created a new application in 9.18.0. When I imported my module, I am unable to find WorkflowContext in the System module of this version. What to replace with WorkflowContext option to make it workflow entity. Please help.     Below are the options which are available in WorkflowCommons.
1 answers

in 9.10 the workflow context entity is removed 

And you now just define the context entity, which is the data object of the workflow. But it isn't needed anymore to inherit anymore.