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: import.rb
    path of file: ./repos/flipper/lib/flipper/api/v1/actions
    
    the code of the file until where you have to start completion: require 'flipper/exporters/json/export'
require 'flipper/api/action'
require 'flipper/api/v1/decorators/feature'

module Flipper
  module Api
    module V1
      module Actions
        cl
    
          def post
            # Rack 3 changed the requirement to rewind the body, so we can't assume it is rewound,
            # so rewind before under Rack 3+ and after under Rack 2.
            request.body.rewind if Gem::Version.new(Rack.release) >= Gem::Version.new('3.0.0')
            body = request.body.read
            request.body.rewind if Gem::Version.new(Rack.release) < Gem::Version.new('3.0.0')
            export = Flipper::Exporters::Json::Export.new(contents: body)
            flipper.import(export)
            json_response({}, 204)
          rescue Flipper::Exporters::Json::InvalidError
            json_error_response(:import_invalid)
          end