addOffsetChangedListener method
Adds a callback that will be called when the value of offset changes.
Implementation
void addOffsetChangedListener(VoidCallback onChanged) {
_offsetNotifier.addListener(onChanged);
}
Adds a callback that will be called when the value of offset changes.
void addOffsetChangedListener(VoidCallback onChanged) {
_offsetNotifier.addListener(onChanged);
}