div method
Divide this by arg.
Implementation
void div(Vector4 arg) {
final Float64List argStorage = arg._v4storage;
_v4storage[0] = _v4storage[0] / argStorage[0];
_v4storage[1] = _v4storage[1] / argStorage[1];
_v4storage[2] = _v4storage[2] / argStorage[2];
_v4storage[3] = _v4storage[3] / argStorage[3];
}