@java.lang.Override
    public float getTiltAngle() {
      return tiltAngle_;
    }
<pre>
Pitch angle, which indicates the upwards/downwards angle that the face is
pointing relative to the image's horizontal plane. Range [-180,180].
</pre>

<code>float tilt_angle = 6;</code>

@return The tiltAngle.
java-vision/proto-google-cloud-vision-v1p2beta1/src/main/java/com/google/cloud/vision/v1p2beta1/FaceAnnotation.java