recipients
The recipients of the MMS message, as an array of MMS handles.
Declaration
var recipients: [MMSHandle]Discussion
When this array contains any elements, it may imply that the corresponding message is a group MMS. To determine if the message is a group MMS, inspect the value of the from property for multiple distinct handles. For example, if recipients == [A] and from == B, then the MMS uses a group consisting of A, B, and the person using the app.