def ns2u(x):
        return unicode(x)
Verifies that no two objects have the same ID.  Checks all descendants.
dataset/ETHPy150Open ioflo/ioflo/ioflo/aid/sixing.py/ns2u--crossover with--dataset/ETHPy150Open adblockplus/gyp/pylib/gyp/xcodeproj_file.py/XCObject.EnsureNoIDCollisions