[R] R5 multiple inheritance

Hi all - Is anyone aware of any solutions (or workarounds) for R5 classes that allow multiple inheritance? Alternatively, if anyone has ideas about how where I may be able to start, I'm willing to delve into dark magic. It's presently possible to give multiple superclasses in contains, but met

Re: [R] Database abstraction

I was also wondering about precedents or similar packages in the R ecosytem. I'm familiar with R-ORM and SQLDF, which seem closest. At this point any and all feedback and critiques are extremely welcome! I imagine other frequent database users have had problems much the same as mine. I'd like to