SetAccess attribute enables
you to determine under what conditions code can modify object property
values. There are four levels of set access that provide varying degrees
of access to object property values:
SetAccess = public — any
code with access to an object can set public property values. There
are differences between the behavior of handle and value classes with
respect to modifying object properties.
SetAccess = protected —
only code executing from within class methods or methods of subclasses
can set property values. You cannot change the value of an object
property unless the class or any of its subclasses defines a method
to do so.
SetAccess = private — only
the defining class can set property values. You can change the value
of an object property only if the class defines a method to perform
SetAccess = immutable —
only the class constructor can set property values. You cannot change
the value of an object property.