code: private SimplePhysicalEntity createSimplePhysicalEntity(physicalEntityParticipant pep) {
  		physicalEntity pe2 = pep.getPHYSICAL_ENTITY();
  		return createSimplePhysicalEntity(pe2, pep.getUri());
  	}
docs: /*
  Create L3 simple PE type using the L2 pEP.
  
  When pEP's PHYSICAL_ENTITY is either complex
  or basic physicalEntity, null will be the result.