copyInto method
Copy this into arg.
Implementation
Vector3 copyInto(Vector3 arg) {
  final Float64List argStorage = arg._v3storage;
  argStorage[0] = _v3storage[0];
  argStorage[1] = _v3storage[1];
  argStorage[2] = _v3storage[2];
  return arg;
}Copy this into arg.
Vector3 copyInto(Vector3 arg) {
  final Float64List argStorage = arg._v3storage;
  argStorage[0] = _v3storage[0];
  argStorage[1] = _v3storage[1];
  argStorage[2] = _v3storage[2];
  return arg;
}