public Builder mergeAssetGcsSource(
        com.google.cloud.visionai.v1.AssetSource.AssetGcsSource value) {
      if (assetGcsSourceBuilder_ == null) {
        if (((bitField0_ & 0x00000004) != 0)
            && assetGcsSource_ != null
            && assetGcsSource_
                != com.google.cloud.visionai.v1.AssetSource.AssetGcsSource.getDefaultInstance()) {
          getAssetGcsSourceBuilder().mergeFrom(value);
        } else {
          assetGcsSource_ = value;
        }
      } else {
        assetGcsSourceBuilder_.mergeFrom(value);
      }
      if (assetGcsSource_ != null) {
        bitField0_ |= 0x00000004;
        onChanged();
      }
      return this;
    }
<pre>
Output only. The original cloud storage source uri that is associated with
this asset.
</pre>

<code>
.google.cloud.visionai.v1.AssetSource.AssetGcsSource asset_gcs_source = 4 [(.google.api.field_behavior) = OUTPUT_ONLY];
</code>
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/Asset.java