WebrtcSignalingMessage.init()
DESCRIPTION
Construct a WebRTC Signaling message from a SignalingCandidate or a SignalingDescription.
A WebrtcSignalingMessage can only contain one of the two, so either the candidate or the description must be nil.
DECLARATION
public init(candidate: SignalingCandidate? = nil, description: SignalingDescription? = nil)
PARAMETERS
candidate:- The candidate if this is a candidate.
description:- The description if this is a description.