FETCH_CANCEL — MoQT draft-15 §9.18.

A subscriber sends a FETCH_CANCEL message to a publisher to indicate it is no longer interested in receiving objects for the fetch identified by the 'Request ID'. The publisher SHOULD promptly close the unidirectional stream, even if it is in the middle of delivering an object.

The format of FETCH_CANCEL is as follows:

FETCH_CANCEL Message {
  Type (i) = 0x17,
  Length (16),
  Request ID (i)
}

Figure 20: MOQT FETCH_CANCEL Message

Request ID: The Request ID of the FETCH (Section 9.16) this message is cancelling.