Closes this overlay without an accepting intent, e.g. when a "Cancel" button was clicked.
To close an overlay with an accepting intent, use up.Layer#accept() instead.
up.Layer#accept()
The dismissal value that will be passed to { onDismissed } callbacks.
{ onDismissed }
If there isn't an acceptance value, omit this argument. If you need to pass options without a dismissal value, pass null:
null
up.layer.dismiss(null, { animation: 'move-to-bottom' })
See options for up.Layer#accept().
