code: function from(input, scheduler) {
      if (!scheduler) {
          if (input instanceof _Observable__WEBPACK_IMPORTED_MODULE_0__["Observable"]) {
              return input;
          }
          return new _Observable__WEBPACK_IMPORTED_MODULE_0__["Observable"](Object(_util_subscribeTo__WEBPACK_IMPORTED_MODULE_9__["subscribeTo"])(input));
      }
      if (input != null) {
          if (Object(_util_isInteropObservable__WEBPACK_IMPORTED_MODULE_3__["isInteropObservable"])(input)) {
              return Object(_fromObservable__WEBPACK_IMPORTED_MODULE_8__["fromObservable"])(input, scheduler);
          }
          else if (Object(_util_isPromise__WEBPACK_IMPORTED_MODULE_1__["isPromise"])(input)) {
              return Object(_fromPromise__WEBPACK_IMPORTED_MODULE_6__["fromPromise"])(input, scheduler);
          }
          else if (Object(_util_isArrayLike__WEBPACK_IMPORTED_MODULE_2__["isArrayLike"])(input)) {
              return Object(_fromArray__WEBPACK_IMPORTED_MODULE_5__["fromArray"])(input, scheduler);
          }
          else if (Object(_util_isIterable__WEBPACK_IMPORTED_MODULE_4__["isIterable"])(input) || typeof input === 'string') {
              return Object(_fromIterable__WEBPACK_IMPORTED_MODULE_7__["fromIterable"])(input, scheduler);
          }
      }
      throw new TypeError((input !== null && typeof input || input) + ' is not observable');
  }
docs: PURE_IMPORTS_START _Observable,_util_isPromise,_util_isArrayLike,_util_isInteropObservable,_util_isIterable,_fromArray,_fromPromise,_fromIterable,_fromObservable,_util_subscribeTo PURE_IMPORTS_END