code: function PacketEvent(properties) {
  			this.groups = [];
  			if (properties)
  				for (var keys = Object.keys(properties), i = 0; i < keys.length; ++i)
  					if (properties[keys[i]] != null)
  						this[keys[i]] = properties[keys[i]];
  		}
docs: Properties of a PacketEvent.
  @memberof packets
  @interface IPacketEvent
  @property {string} ver PacketEvent ver
  @property {string} sender PacketEvent sender
  @property {string} event PacketEvent event
  @property {string|null} [data] PacketEvent data
  @property {Array.<string>|null} [groups] PacketEvent groups
  @property {boolean} broadcast PacketEvent broadcast
   
  Constructs a new PacketEvent.
  @memberof packets
  @classdesc Represents a PacketEvent.
  @implements IPacketEvent
  @constructor
  @param {packets.IPacketEvent=} [properties] Properties to set