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: builder.rb
    path of file: ./repos/stackneveroverflow/vendor/bundle/ruby/2.3.0/gems/nokogiri-1.8.0/lib/nokogiri/xml
    
    the code of the file until where you have to start completion: module Nokogiri
  module XML
    ###
    # Nokogiri builder can be used for building XML and HTML documents.

    
      def method_missing method, *args, &block # :nodoc:
        if @context && @context.respond_to?(method)
          @context.send(method, *args, &block)
        else
          node = @doc.create_element(method.to_s.sub(/[_!]$/, ''),*args) { |n|
            # Set up the namespace
            if @ns.is_a? Nokogiri::XML::Namespace
              n.namespace = @ns
              @ns = nil
            end