public Builder setZ(float value) {

      z_ = value;
      bitField0_ |= 0x00000004;
      onChanged();
      return this;
    }
<pre>
Z coordinate (or depth).
</pre>

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

@param value The z to set.
@return This builder for chaining.
java-vision/proto-google-cloud-vision-v1/src/main/java/com/google/cloud/vision/v1/Position.java