code: public com.google.protobuf.ByteString
        getSourceUrlBytes() {
      java.lang.Object ref = sourceUrl_;
      if (ref instanceof java.lang.String) {
        com.google.protobuf.ByteString b = 
            com.google.protobuf.ByteString.copyFromUtf8(
                (java.lang.String) ref);
        sourceUrl_ = b;
        return b;
      } else {
        return (com.google.protobuf.ByteString) ref;
      }
    }
docs: <pre>
  URL of the zip file to deploy from. Must be a URL to a resource in
  Google Cloud Storage in the form
  'http(s)://storage.googleapis.com/&#92;&lt;bucket&#92;&gt;/&#92;&lt;object&#92;&gt;'.
  </pre>
  
  <code>string source_url = 3;</code>