Just as you can declare functions as open and override them in subclasses, you can do the same with properties.

This is less common than is overriding functions.

You can learn more about this in:
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Abstract Classes Adding Functions to Classes Adding Properties to Classes Chaining to Superclass Functions Checking Inheritance Via is Classes and Instances Constructor Init-Only Parameters Constructors Data Class enum and Functions enum and when() enum Class enum name and ordinal enum valueOf() enum values() Formal Constructor Declaration Hello, World! (In a Class) Inheritance Inheritance and Constructors Inheritance and Functions Inheritance and Overriding Functions Init Block Inner Classes Inner Classes and Outer this Inner Classes and this is and when Manual Casts Nested Classes Nested Classes and Private Access Non-Nested Sealed Classes override is Transitive Overriding Properties Passing this as a Parameter Printing the Class of Numbers Sealed Classes Sealed Classes and when Secondary Constructors Smart Casts The this Pseudo-Property
Chaining to Superclass Functions Checking Inheritance Via is Inheritance Inheritance and Constructors Inheritance and Functions Inheritance and Overriding Functions is and when Manual Casts override is Transitive Overriding Properties Smart Casts
Abstract val Custom Getter Abstract val Properties Abstract var lateinit Properties lazy Properties Overriding Properties Property Initialization in Declaration Property Initialization in Init Block
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