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• The following methods in OpenJPAPersistence return things that are not currently part of what I consider a user-focused API:
  toBrokerFactory()
  toBroker()
  toEntityManagerFactory()
  toEntityManager()
  getMetaData()
  toOpenJPAObjectId() / toOpenJPAObjectIds()

            I think that we should move these methods to o.a.o.persistence.impl.ImplHelper or some other impl-specific class.

• We have a bunch of methods in OpenJPAEntityManager that seem like they should belong on a new OpenJPAEntityTransaction interface:

                public void commitAndResume();
                public void rollbackAndResume();
                public void setRollbackOnly(); (already part of EntityTransaction)
                public void setRollbackOnly(Throwable cause);
                public Throwable getRollbackCause();
                public boolean getRollbackOnly(); (also already part of EntityTransaction)

                public boolean isStoreActive();
                public void beginStore();

            I'm not quite as sure where these belong:

                public void setSavepoint(String name);
                public void rollbackToSavepoint();
                public void rollbackToSavepoint(String name);
                public void releaseSavepoint();
                public void releaseSavepoint(String name);

                public void preFlush();
                public void validateChanges();

• I don't like the OpenJPAEntityManager.setLargeTransaction() method name – - I'd like to rename it to setTrackChangesByType() instead, since it better reflects what the method does. (We can easily deprecate the old method if desired.)

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