Understanding the purpose of a getter and setter
Now that we have a property set up, we need to answer a logical question: what are they used for? As stated before, if you have a variable that belongs to a function block, you never want to directly access it. At first glance, this may seem like a convoluted way of doing things; however, the power of a getter method comes in the form of the logic that it contains. Essentially, both getter and setter methods can support logic that can vet how and what’s reading or writing the variable.
Getter method
A getter method is used to read a variable in a function block. For the most part, getters usually have very simple logic. In short, many of the getter methods that I have written in the past (regardless of the language or project that I am working on) are usually methods that simply return a class, function block, or variable.
A basic demonstration for a getter method is reading a variable from the function block we have...