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Declaring Public Methods 

All the methods of a class are by default private methods and cannot be accessed by the application programmer. If you want to make a method public, you can include its name in the -method section of the class declaration. In our TixArrowButton example, we have declared that the methods flash, invert and invoke are public methods and they can be accessed by the application programmer. All other methods of the TixArrowButton class will be private. Usually, the names of private methods start with a capital letter with individual words capitalized. The names of public methods start with a lowercase letter.