### New Issue Checklist
* [X ] I have read and understood the [CONTRIBUTING guide](https://github.com/rs/SDWebImage/blob/master/.github/CONTRIBUTING.md)
* [X ] I have read the [Documentation](http…
This is a proposal for an amendment to RFC #42. I'm posting it here separately because the original thread is too long, and I want to collect feedback before updating the original RFC with this.
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