code: public Matrix4d add(Matrix4dc other, Matrix4d dest) {
          dest.m00 = m00 + other.m00();
          dest.m01 = m01 + other.m01();
          dest.m02 = m02 + other.m02();
          dest.m03 = m03 + other.m03();
          dest.m10 = m10 + other.m10();
          dest.m11 = m11 + other.m11();
          dest.m12 = m12 + other.m12();
          dest.m13 = m13 + other.m13();
          dest.m20 = m20 + other.m20();
          dest.m21 = m21 + other.m21();
          dest.m22 = m22 + other.m22();
          dest.m23 = m23 + other.m23();
          dest.m30 = m30 + other.m30();
          dest.m31 = m31 + other.m31();
          dest.m32 = m32 + other.m32();
          dest.m33 = m33 + other.m33();
          dest.properties = 0;
          return dest;
      }
docs: /* (non-Javadoc)
  @see org.joml.Matrix4dc#add(org.joml.Matrix4dc, org.joml.Matrix4d)