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| struct   | IndexedGradientKnot< T_Float, T_Int > | 
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| class   | SortedGradientKnots< T_Float, T_Int > | 
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| class   | IndexedGradientSampler< T_ModeNone, T_ModeLinearKnot, T_ModeSmoothKnot, T_ModeBlend, T_ModeCubicKnot, T_ModeCubicBias > | 
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| class   | GradientSampler< T_ModeNone, T_ModeLinearKnot, T_ModeSmoothKnot, T_ModeBlend, T_ModeCubicKnot, T_ModeCubicBias > | 
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