docs: def getLastRabaId(self, cls) :
  		"""keep track all loaded raba classes"""
  		self.loadedRabaClasses[cls.__name__] = cls
  		sql = 'SELECT MAX(raba_id) from %s LIMIT 1' % (cls.__name__)
  		cur = self.execute(sql)
  		res = cur.fetchone()
  		try :
  			return int(res[0])+1
  		except TypeError:
  			return  0