{"ast":null,"code":"import { operate } from '../util/lift';\nimport { concatAll } from './concatAll';\nimport { popScheduler } from '../util/args';\nimport { from } from '../observable/from';\nexport function concat(...args) {\n  const scheduler = popScheduler(args);\n  return operate((source, subscriber) => {\n    concatAll()(from([source, ...args], scheduler)).subscribe(subscriber);\n  });\n}\n//# sourceMappingURL=concat.js.map","map":null,"metadata":{},"sourceType":"module","externalDependencies":[]}