def dmp_integrate_in(f, m, j, u, K):
    if j < 0 or j > u:
        raise IndexError("0 <= j <= u expected, got %s" % (u, j))

    return _rec_integrate_in(f, m, u, 0, j, K)
If an element is not present, then it cannot be invisible, either
dataset/ETHPy150Open sympy/sympy/sympy/polys/densetools.py/dmp_integrate_in--crossover with--dataset/ETHPy150Open edx/bok-choy/tests/test_visible.py/VisibleTest.test_not_invisible