add9 method
void
add9()
Implementation
void add9(double a, double b, double c, double d, double e, double f,
double g, double h, double i) {
_ensure(9);
final p = _data, n = length;
p[n] = a;
p[n + 1] = b;
p[n + 2] = c;
p[n + 3] = d;
p[n + 4] = e;
p[n + 5] = f;
p[n + 6] = g;
p[n + 7] = h;
p[n + 8] = i;
length += 9;
}