copyInto method
Copy this into arg.
Implementation
Matrix3 copyInto(Matrix3 arg) {
final Float64List argStorage = arg._m3storage;
argStorage[0] = _m3storage[0];
argStorage[1] = _m3storage[1];
argStorage[2] = _m3storage[2];
argStorage[3] = _m3storage[3];
argStorage[4] = _m3storage[4];
argStorage[5] = _m3storage[5];
argStorage[6] = _m3storage[6];
argStorage[7] = _m3storage[7];
argStorage[8] = _m3storage[8];
return arg;
}