code: def all_firmwares(self):
          ''' return firmware entries from all manifests'''
          all = []
          for manifest in self.manifests:
              for firmware in manifest["firmware"]:
                  all.append(firmware)
          return alf all_firmwares(self):
          ''' return firmware entries from all manifests'''
          all = []
          for manifest in self.manifests:
              for firmware in manifest["firmware"]:
                  all.append(firmware)
          return all
docs: return firmware entries from all manifests