A snackbar has a queue of Notifications, each with the amount of ms the message should be displayed
A message with maybe some action button
Initial state
Returns the current element.
Updates the model. This functions should be called regularly. The first argument is the milliseconds that passed since the last time the function was called.
Views the current Message. (only one at a time)
Insert a message that will last for 10 seconds.
Insert a message for a specific amount of milliseconds.
Dismiss the current message.