operator == method

@override bool operator ==(Object other)

相等性比较

Implementation

@override
bool operator ==(Object other) {
  if (identical(this, other)) return true;
  return other is RectangleFeature &&
      other.topLeft == topLeft &&
      other.topRight == topRight &&
      other.bottomRight == bottomRight &&
      other.bottomLeft == bottomLeft;
}