Returns a new collection of Host Models
See README.Topo2Collection
#Model
Calls the super method.
Called when the model properties change. Updates the classNames, visibility and Device Color.
Displays the details panel
Returns the icon to be used for the device
Returns the label for the host
Determines the scale of the icon
Hides or Shows according to the value specified in the topo2_prefs['offline_devices']
Creates a host node to be placed within the DOM