* Add Freeze/Thaw events and tests * Remove duplicate docstring * Correct spelling error * Cargo fmt * Use proper punctuation in docstring Co-authored-by: Jegor Sidorenko <5252494+jsidorenko@users.noreply.github.com> --------- Co-authored-by: Jegor Sidorenko <5252494+jsidorenko@users.noreply.github.com> Co-authored-by: parity-processbot <>