class Metanorma::Utils::Log

def add(category, loc, msg)
  return if @novalid
  @log[category] = [] unless @log[category]
  @log[category] << { location: current_location(loc), message: msg,
                      context: context(loc) }
  loc = loc.nil? ? "" : "(#{current_location(loc)}): "
  warn "#{category}: #{loc}#{msg}" 
end