Function qip::iterators::sum_for_ops_cols

pub fn sum_for_ops_cols<P: Precision, F: Fn((u64, Complex<P>)) -> Complex<P>>(
    row: u64, 
    ops: &[PrecisionUnitaryOp<P>], 
    f: F
) -> Complex<P>

Like sum_for_op_cols but takes multiple ops at once.