presto-main/src/main/java/io/prestosql/sql/analyzer/FeaturesConfig.java/FeaturesConfig/setRegexLibrary
class FeaturesConfig:    @Config("regex-library")
    public FeaturesConfig setRegexLibrary(RegexLibrary regexLibrary)
    {
        this.regexLibrary = regexLibrary;
        return this;
    }