def built_file_must_not_contain(self, name, contents, **kw):
    return self.must_not_contain(self.built_file_path(name, **kw), contents)
Generates an link.AffineTrasform that slightly perturbs the image.  Primarily 
dataset/ETHPy150Open adblockplus/gyp/test/lib/TestGyp.py/TestGypBase.built_file_must_not_contain--crossover with--dataset/ETHPy150Open bolme/pyvision/src/pyvision/types/Affine.py/AffinePerturb