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=== Explanation ===
The main work of a Gramplet is performed in a function, or a class. In this very simple example, a function
'''init ''' is defined that takes a single argument, gui. The function simply sets the gui's text area to be "Hello World!", and that's it. It does this just once, and never changes.
Before a plugin can be used, it needs to be "registered". You call the register function with a number of named-arguments. There are a number of named-arguments that you can provide, including: name, height, content, title, expand, state, and data. We will explore those in detail, below.