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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 is_bounded(self, ast):
 """ Test whether an AST is bounded by any existing constraint in the related solver. :param ast: an claripy.AST object :return: True if there is at least one related constraint, False otherwise """


        return len(ast.variables.intersection(self.state.solver._solver.variables)) != 0