Java style regex pattern. Do not include the typical / at start or end of regex in some languages. Given an example your code is: 12345 the pattern to extract match looks like code is: (\d{6}). This will return an array of matches with the first matching the entire pattern and the subsequent matching the groups: ['code is: 123456', '123456'] See https://docs.oracle.com/javase/8/docs/api/java/util/regex/Pattern.html for more information of available patterns.
ContentMatchOptions
Options for matching content using regex patterns based on Java Pattern syntax
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Interface
ContentMatchOptions