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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 render(self):
 """ Returns whole information on the progress for the current's bar state, as a string. """

        elements = [self.render_element(e) for e in self.widgets]
        progressbar = self.separator.join(elements)
        width = get_terminal_width()
        if width:
            # leave last column for cursor
            progressbar = progressbar.ljust(width - 1)
        return progressbar