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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 add_space(self, line):
 """Add a Space object to the section Used during initial parsing mainly Args: line (str):
 one line that defines the space, maybe whitespaces """

        if not isinstance(self.last_item, Space):
            space = Space(self._structure)
            self._structure.append(space)
        self.last_item.add_line(line)
        return self