This is my requirement. I am writing a combobox class. This class has an item 
property. It contains a seq. One wants to insert int or string or float, or 
even a window handle too. After a lot of experiments, i decided to make that 
seq[string] type and if i convert the input data to string with "$" operator, 
then i can easily put that value in my combobox. BTW, i didn't properly 
understand dynamic dispatch. If you don't mind, could you please explain a 
little bit ?

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