sub method
Subtract arg from this.
Implementation
void sub(Vector3 arg) {
  final argStorage = arg._v3storage;
  _v3storage[2] -= argStorage[2];
  _v3storage[1] -= argStorage[1];
  _v3storage[0] -= argStorage[0];
}
Subtract arg from this.
void sub(Vector3 arg) {
  final argStorage = arg._v3storage;
  _v3storage[2] -= argStorage[2];
  _v3storage[1] -= argStorage[1];
  _v3storage[0] -= argStorage[0];
}