Default is 0.0. If different than 0.0, blurs only Snack's background.
To take effect, make sure your backgroundColor has some opacity.
The greater the value, the greater the blur.
boxShadows The shadows generated by Snack. Leave it null
if you don't want a shadow.
You can use more than one if you feel the need.
Check (this example)https://github.com/flutter/flutter/blob/master/packages/flutter/lib/src/material/shadows.dart
You can use any widget here, but I recommend Icon or Image as
indication of what kind
of message you are displaying. Other widgets may break the layout
Determines if the user can swipe or click the overlay
(if overlayBlur > 0) to dismiss.
It is recommended that you set duration != null if this is false.
If the user swipes to dismiss or clicks the overlay, no value
will be returned.
If not null, shows a left vertical colored bar on notification.
It is not possible to use it with a Form and I do not recommend
using it with LinearProgressIndicator
Default is 0.0. If different than 0.0, creates a blurred
overlay that prevents the user from interacting with the screen.
The greater the value, the greater the blur.
Default is Colors.transparent. Only takes effect if overlayBlur > 0.0.
Make sure you use a color with transparency here e.g.
Colors.grey600.withOpacity(0.2).
Snack can be floating or be grounded to the edge of the screen.
If grounded, I do not recommend using margin or borderRadius.
SnackStyle.FLOATING is the default
If grounded, I do not recommend using a backgroundColor with
transparency or barBlur
