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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def show_channel_names(self):
 """Show each channel's name in its image viewer. Useful in 'grid' or 'stack' workspace type to identify which window is which. """

        for name in self.get_channel_names():
            channel = self.get_channel(name)
            channel.fitsimage.onscreen_message(name, delay=2.5)