code: public Matrix4 set (IMatrix4 other) {
          return set(other.m00(), other.m10(), other.m20(), other.m30(),
                     other.m01(), other.m11(), other.m21(), other.m31(),
                     other.m02(), other.m12(), other.m22(), other.m32(),
                     other.m03(), other.m13(), other.m23(), other.m33());
      }
docs: Copies the contents of another matrix.
  
  @return a reference to this matrix, for chaining.