copyFromArray method
array - the array to read the elements from.
offset - (optional) index of first element in the array.
Default is 0.
Sets the elements of this matrix based on an array in column-major format.
Implementation
Matrix3 copyFromArray(List<double> array, {int offset = 0}) {
  for (int i = 0; i < 9; i++) {
    storage[i] = array[i + offset];
  }
  return this;
}