public Builder setContent(com.google.protobuf.ByteString value) {
      if (value == null) {
        throw new NullPointerException();
      }
      content_ = value;
      bitField0_ |= 0x00000001;
      onChanged();
      return this;
    }
<pre>
Image content, represented as a stream of bytes.
Note: As with all `bytes` fields, protobuffers use a pure binary
representation, whereas JSON representations use base64.

Currently, this field only works for BatchAnnotateImages requests. It does
not work for AsyncBatchAnnotateImages requests.
</pre>

<code>bytes content = 1;</code>

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