deactivate method

void deactivate()

The framework calls this method whenever it removes this StateX object from the tree.

Implementation

void deactivate() {
  /// The framework calls this method whenever it removes this [State] object
  /// from the tree. It might reinsert it into another part of the tree.
  /// Subclasses should override this method to clean up any links between
  /// this object and other elements in the tree (e.g. if you have provided an
  /// ancestor with a pointer to a descendant's [RenderObject]).
}