public static com.google.cloud.vision.v1.Position getDefaultInstance() {
    return DEFAULT_INSTANCE;
  }
<pre>
Z coordinate (or depth).
</pre>

<code>float z = 3;</code>

@return This builder for chaining.
java-vision/proto-google-cloud-vision-v1/src/main/java/com/google/cloud/vision/v1/Position.java