You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: message.rb
    path of file: ./repos/arachni/lib/arachni/http
    
    the code of the file until where you have to start completion: =begin
    Copyright 2010-
    
    def update( options )
        @normalize_url = options[:normalize_url]

        # Headers are necessary for subsequent operations to set them first.
        @headers = Headers.new( options[:headers] || {} )

        options.each do |k, v|
            begin
                send( "#{k}=", v )
            rescue NoMethodError
                instance_variable_set( "@#{k}".to_sym, v )
            end
        end