didChangeDependencies method
void
didChangeDependencies()
Called when immediately after initState. Otherwise called only if a dependency of an InheritedWidget.
Implementation
void didChangeDependencies() {
///
/// if a State object's [build] references an [InheritedWidget] with
/// [context.dependOnInheritedWidgetOfExactType]
/// its Widget is now a 'dependency' of that that InheritedWidget.
/// Later, if that InheritedWidget's build() function is called, all its dependencies
/// build() functions are also called but not before this method again.
/// Subclasses rarely use this method, but its an option if needed.
}