I had a complete brain fart during my presentation, when somebody asked about the Open Closed Principle. It means open to extension, closed to modification. So that means it ok to add more methods to your API, but you can't modify the existing API.
Here is the wikipedia page on it. https://en.wikipedia.org/wiki/Open–closed_principle
If you google it you will find plenty of examples.
Sam Taggart
CLA, CPI, CTD, LabVIEW Champion
DQMH Trusted Advisor
Read about my thoughts on Software Development at
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