type Point3D struct { Object; x, y, z float64 }
type Line    struct { Object; p, q Point3D }
</pre>

<p>
one may write
</p>

<pre>
origin := Point3D{}                                       // zero value for Point3D
line1 := Line{Object{}, origin, Point3D{y: -4, z: 12.3}}  // zero value for line1.q.x

    *   Stop constructing `Status` objects from `tensorflow::error::Code`.
    *   One MUST NOT access `tensorflow::errors::Code` fields. Accessing
        `tensorflow::error::Code` fields is fine.
        *   Use the constructors such as `tensorflow::errors:InvalidArgument` to
            create status using an error code without accessing it.
        *   Use the free functions such as