Defines a transformer rule
Warning
uCalc API Preview Release Notice:The uCalc engine has successfully transitioned to modern cross-platform environments.The next phase envolves some structural changes, performance optimizations, and API refinements.The API is subject to breaking changes prior to the stable release. Please evaluate the preview version thoroughly before production use.
Object for rule being defined
[revisit]Whenever a piece of text matches the pattern described in FromStr, it is replaced with the text found in ToStr.