code: def _create_body(self, name, flavor=None, volume=None, databases=None,
              users=None, version=None, type=None):
          
          if flavor is None:
              flavor = 1
          flavor_ref = self.api._get_flavor_ref(flavor)
          if volume is None:
              volume = 1
          if databases is None:
              databases = []
          if users is None:
              users = []
  
          body = {"instance": {
                  "name": name,
                  "flavorRef": flavor_ref,
                  "volume": {"size": volume},
                  "databases": databases,
                  "users": users,
                  }}
  
          if type is not None or version is not None:
              required = (type, version)
              if all(required):
                  body['instance']['datastore'] = {"type": type, "version": version}
              else:
                  raise exc.MissingCloudDatabaseParameter("Specifying a datastore"
                      " requires both the datastore type as well as the version.")
          return body
docs: Used to create the dict required to create a Cloud Database instance.