public Builder clearAssetContentData() {
        bitField0_ = (bitField0_ & ~0x00000001);
        assetContentData_ = getDefaultInstance().getAssetContentData();
        onChanged();
        return this;
      }
<code>bytes asset_content_data = 1;</code>

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