1 files changed, 8 insertions, 0 deletions
diff --git a/node_modules/rxjs/src/internal/util/isInteropObservable.ts b/node_modules/rxjs/src/internal/util/isInteropObservable.ts
new file mode 100644
index 0000000..e709b8a
--- /dev/null
+++ b/node_modules/rxjs/src/internal/util/isInteropObservable.ts
@@ -0,0 +1,8 @@
+import { InteropObservable } from '../types';
+import { observable as Symbol_observable } from '../symbol/observable';
+import { isFunction } from './isFunction';
+
+/** Identifies an input as being Observable (but not necessary an Rx Observable) */
+export function isInteropObservable(input: any): input is InteropObservable<any> {
+  return isFunction(input[Symbol_observable]);
+}