This is a very common pattern in the generated code:
public interface IBaseMessageCollectionRequestBuilder extends IRequestBuilder {

IMessageCollectionRequest buildRequest();

IMessageCollectionRequest buildRequest(final java.util.List<Option> requestOptions);

...
Firstly the final keyword doesn't do anything and can be chucked.
Secondly, a varargs overload would make life easier for the client:
IMessageCollectionRequest buildRequest(Option... requestOptions);
Without the varargs overload I have to do this (using guava dependency as well):
.buildRequest(Lists.newArrayList(new QueryOption("filter", "isRead eq false")));
I would like to do:
.buildRequest(new QueryOption("filter", "isRead eq false"));
AB#6039