public Set<Range> getRequiredInformRanges(String treeName) {
        return informMatcherActionRanges.computeIfAbsent(treeName, k -> Collections.emptySet());
    }
Parses and analyzes the useragent string provided in the MutableUserAgent instance.
NOTE: This method is internally synchronized because the way the analyzer works is not reentrant.
@param userAgent The MutableUserAgent instance that is to be parsed and that gets all results
@return An ImmutableUserAgent copy of the results that is suitable for further usage and caching.
analyzer/src/main/java/nl/basjes/parse/useragent/analyze/UserAgentStringMatchMaker.java