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substitute_string processor matches a key’s value against a regular expression and replaces all matches with a replacement string.
substitute_string is a mutate string processor.
The following table describes the options you can use to configure the
|entries||Yes||List||List of entries. Valid values are |
|source||N/A||N/A||The key to modify.|
|from||N/A||N/A||The Regex String to be replaced. Special regex characters such as |
|to||N/A||N/A||The String to be substituted for each match of |