Function ifftn_adaptive 

pub fn ifftn_adaptive<T>(
    _x: &[T],
    shape: Option<&[usize]>,
    axes: Option<&[usize]>,
    norm: Option<&str>,
) -> FFTResult<ArrayD<Complex64>>
where
    T: NumCast + Copy + Debug + 'static,

Adaptive N-dimensional inverse FFT