create jira issues for jbpm 3 features that are not yet implemented in jbpm 4. and provide pointer to those issues from the devguide so that people can vote for it if they want these features in jbpm4. that way we can prioritize appropriately. E.g.

• Advanced task properties:
  <task subtask-synchronization="first, last, unsynchronized, never">
  <task blocking="true">

• Assignment expression language

• Config types for user code