# Package org.jbpm.kie.services.impl.bpmn2.builder

- Interface Summary
  Interface | Description
  --- | ---
  DataServiceExpressionBuilder | This interface defines the method that the data service `ActionBuilder`, `ReturnValueEvaluatorBuilder`, `AssignmentBuilder` and `ProcessBuilder` implementations must implement so that a `ProcessDescRepoHelper` can be (thread-locally) set.

- Class Summary
  Class | Description
  --- | ---
  GenericDefaultThreadLocal<T> | This is a generic extension of the `ThreadLocal` class that makes sure that an intial value is available for each call of `ThreadLocal.get()`.

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