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: relationships.rb
    path of file: ./repos/sinja/lib/sinja/helpers
    
    the code of the file until where you have to start completion: # frozen_string_literal: true
require 'json'

module Sinja
  module Helpers
    module Relationships
    
      def dispatch_relationship_request(id, path, **opts)
        path_info = request.path_info.dup
        path_info << "/#{id}" unless path_info.end_with?("/#{id}")
        path_info << "/relationships/#{path}"
        path_info.freeze

        fakenv = env.merge 'PATH_INFO'=>path_info
        fakenv['REQUEST_METHOD'] = opts[:method].to_s.tap(&:upcase!) if opts[:method]
        fakenv['rack.input'] = StringIO.new(JSON.fast_generate(opts[:body])) if opts.key?(:body)
        fakenv['sinja.passthru'] = opts.fetch(:from, :unknown).to_s
        fakenv['sinja.resource'] = resource if resource

        call(fakenv)
      end