Function isInProgressUpload

isInProgressUpload(stub): stub is SanityFileUploadStub | SanityImageUploadStub
Checks whether or not the given source is an in-progress upload (has upload property but no asset property)
Parameters
- stub: unknown
  Possible in-progress upload
Returns stub is SanityFileUploadStub | SanityImageUploadStub
Whether or not the passed object is an in-progress upload
- Defined in src/asserters.ts:145