operator == method
Compares this OverflowBounds with another object for equality.
Returns true if other is an OverflowBounds with identical overflow values.
Implementation
@override
bool operator ==(Object other) {
  if (identical(this, other)) return true;
  if (other.runtimeType != runtimeType) return false;
  return other is OverflowBounds &&
      other.top == top &&
      other.bottom == bottom &&
      other.left == left &&
      other.right == right;
}