public Builder clearNetworkCode() {
      networkCode_ = getDefaultInstance().getNetworkCode();
      bitField0_ = (bitField0_ & ~0x00000001);
      onChanged();
      return this;
    }
<pre>
Required. Ad Manager network code to associate with the live config.
</pre>

<code>string network_code = 1 [(.google.api.field_behavior) = REQUIRED];</code>

@return This builder for chaining.
java-video-stitcher/proto-google-cloud-video-stitcher-v1/src/main/java/com/google/cloud/video/stitcher/v1/GamLiveConfig.java