Function merge

final/client/src/cache.ts:19–31

(existing, incoming)

        launches: {
          keyArgs: false,
          merge(existing, incoming) {
            let launches: Reference[] = [];
            if (existing && existing.launches) {
              launches = launches.concat(existing.launches);
            }
            if (incoming && incoming.launches) {
              launches = launches.concat(incoming.launches);
            }
            return {
              ...incoming,
              launches,
            };
          }
        }
      }
    }