UseCases
The UseCases library is used to create re-usable actions that represent
executing the logic for carrying out operations specific to a UseCase . Included in the library are UseCaseChain and UseCaseParallel used to
execute UseCases in Series or Parallel.
UseCase (Base Class)
UseCase is a Base Class that should be extended to implement actions in
your API. A UseCase can have a number of UseCases as children and follow
the Single Responsibity design-pattern.