def mergedCapabilities(self):
  fallBackCapabilitites = self.fallBack().mergedCapabilities()
  for i in fallBackCapabilitites
    if i in self.properties["capabilities"]:
      self.properties["capabilities"][i].update(fallBackCapabilitites[i])
    else:
      self.properties["capabilities"][i] = fallBackCapabilitites[i]
  return self.properties