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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 _translate_size(self, s):
 #pylint:disable=no-self-use """ Checks whether this size can be supported by FastMemory." """

        if isinstance(s, claripy.ast.Base) and not s.singlevalued:
            raise SimFastMemoryError("size not supported")
        if s is None:
            return s
        return self.state.solver.eval(s)