#15560
Probably best to review commit by commit.
First commit adds the mockimpl files, second commit amends README.md and
third commit fixes golangci-lint issues.
- [X] Manual QA for all new/changed functionality
Tested by adding a dummy method to service.go and running `make
generate-mock`.
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Co-authored-by: Victor Lyuboslavsky <victor.lyuboslavsky@gmail.com>
