# File lib/geokit/geocoders.rb, line 19
    def underscore(camel_cased_word)
      camel_cased_word.to_s.gsub(/::/, '/').
      gsub(/([A-Z]+)([A-Z][a-z])/u,'\1_\2').
      gsub(/([a-z\d])([A-Z])/u,'\1_\2').
      tr("-", "_").
      downcase
    end