def METHOD_NAME(self, kernel_debug, f1_debug,
                                            f2_debug):
    @cuda.jit(device=True, debug=f2_debug, opt=False)
    def f2(x):
        return x + 1
    @cuda.jit(device=True, debug=f1_debug, opt=False)
    def f1(x, y):
        return x - f2(y)
    @cuda.jit(debug=kernel_debug, opt=False)
    def kernel(x, y):
        f1(x, y)
        f2(x)
    kernel[1, 1](1, 2)