code: public RecoverableUnitSection lookupSection(int identity)
    {
      if (tc.isEntryEnabled()) Tr.entry(tc, "lookupSection",new java.lang.Object[]{this,new Integer(identity)});
  
      SQLRecoverableUnitSectionImpl recoverableUnitSection = (SQLRecoverableUnitSectionImpl)_recoverableUnitSections.get(new Integer(identity));
  
      if (tc.isEntryEnabled()) Tr.exit(tc, "lookupSection",recoverableUnitSection);
      return recoverableUnitSection;
    }
docs: Returns the recoverable unit section previously created with the supplied
  identity. If no such recoverable unit section exists, this method returns null.
  
  @param identity The identitiy of the required recoverable unit section.
  
  @return The recoverable unit section previously created with the supplied
  identity.