kVTSampleAttachmentKey_RequireLTRAcknowledgementToken
A number value that contains a unique token for this Long Term Reference (LTR).
Declaration
let kVTSampleAttachmentKey_RequireLTRAcknowledgementToken: CFStringA number value that contains a unique token for this Long Term Reference (LTR).
let kVTSampleAttachmentKey_RequireLTRAcknowledgementToken: CFString