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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 variable_specifier(self) -> dict: """Return the variable specifier for this variable. The specifier can be used to lookup the value of this variable in a computation context. """

        if self.value_type is not None:
            return {"type": "variable", "version": 1, "uuid": str(self.uuid), "x-name": self.name, "x-value": self.value}
        else:
            return self.specifier