# File lib/static_gmaps.rb, line 136
    def url_fragment
      raise MissingArgument.new("Latitude must be set before a url_fragment can be generated for Marker.") if !latitude
      raise MissingArgument.new("Longitude must be set before a url_fragment can be generated for Marker.") if !longitude
      x  = "#{latitude},#{longitude}"
      x += ",#{color}" if color
      x += "#{alpha_character}" if alpha_character
      return x
    end