createElement method
Inflates this configuration to a concrete instance.
A given component can be included in the tree zero or more times. In particular
a given component can be placed in the tree multiple times. Each time a component
is placed in the tree, it is inflated into an Element, which means a
component that is incorporated into the tree multiple times will be inflated
multiple times.
Implementation
@override
Element createElement() => AsyncStatelessElement(this);