MATLAB Object-Oriented Programming

Use the meta.class property RestrictsSubclassing to determine if a class is
Sealed or specifies AllowedSubclasses.

Define Sealed Hierarchy of Classes

The AllowedSubclasses attribute enables you to define a sealed class hierarchy by
sealing the allowed subclasses:

classdef (AllowedSubclasses = {?SubClass1,?SubClass2}) SuperClass
...
end

Define the allowed subclasses as Sealed:

classdef (Sealed) SubClass1
...
end

classdef (Sealed) SubClass2
...
end

Sealed class hierarchies enable you to use the level of abstraction that your design
requires while maintaining a closed system of classes.