Values.ContactPreferenceSourceObject that defines users contact preference.
type nonrec t = {keyName : Name.t option;A searchable, unique identifier of a customer profile.
*)keyValue : String1To255.t option;The key value used to look up profile based off the keyName.
*)profileId : Uuid.t option;The unique identifier of a customer profile.
*)contactType : ContactType.t option;The contact type used for engagement. For example: HomePhoneNumber, PersonalEmailAddress.
*)}