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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 visit_Slice(self, node: AST, dfltChaining: bool = True) -> str: """Return `node`s representation as slice."""

        elems = [self.visit(node.lower), self.visit(node.upper)]
        if node.step is not None:
            elems.append(self.visit(node.step))
        return ':'.join(elems)