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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 _unassembled_reads2_out_file_name(self):
 """Checks if file name is set for reads2 output. Returns absolute path."""

        if self.Parameters['-2'].isOn():
            unassembled_reads2 = self._absolute(
                str(self.Parameters['-2'].Value))
        else:
            raise ValueError("No reads2 (flag -2) output path specified")
        return unassembled_reads2