Provide a simple working example

[fhidal01]

Can you please provide a simple working example. The example in the read me file doesn't provide any information on what I need to replace the following with:

// Provide the bar controller in build method or default controller as ancestor in a tree
controller: bbc,

What is this controller?
What does it do?

Can we get a sample???

[pishguy]

@fhidal01

controller = BottomBarController(vsync: this, dragLength: 450, snap: true);