Added a brief explanation of how you'd use Printable
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class Print;
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class Print;
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/** The Printable class provides a way for new classes to allow themselves to be printed.
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By deriving from Printable and implementing the printTo method, it will then be possible
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for users to print out instances of this class by passing them into the usual
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Print::print and Print::println methods.
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*/
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class Printable
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class Printable
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{
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{
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public:
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public:
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