Regex

Message defining a custom regular expression.

JSON representation 
{
  "pattern": string,
  "groupIndexes": [
    integer
  ]
}
Fields
pattern

string

Pattern defining the regular expression. Its syntax (https://github.com/google/re2/wiki/Syntax) can be found under the google/re2 repository on GitHub.
groupIndexes[]

integer

The index of the submatch to extract as findings. When not specified, the entire match is returned. No more than 3 may be included.