In OOP, this refers to a lower-level class using the definition for a higher-level class' methods or properties.
In OOP, this refers to a lower-level class using the definition for a higher-level class' methods or properties.
In OOP, this refers to a lower-level class using the definition for a higher-level class' methods or properties.
In OOP, this refers to a lower-level class using the definition for a higher-level class' methods or properties.