BetaOptionalcontentWhen set, the bytes are PUT with this Content-Type.
Same shapes assets.upload accepts, minus node streams: the bytes go
out through fetch, which has no portable stream support. A single
document, or a zip, tar or gzip archive of them.
A file for a
filessource. The client stages an upload, PUTs the bytes straight to storage with a signed URL, and starts the source's sync with it. The Context API never holds the file content.