// That is a subject that might be different in each instance of a category private int _field; // This is the property that accesses a discipline, but because it's visibility // is guarded only subclasses will know relating to this property // (and through it the sphere) - https://propertyingurugram.in/signature-global-awards-rs-567-cr-contracts-for-construction-of-housing-project-in-gurugram/