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: customizations.rb
    path of file: ./repos/aws-sdk-ruby/build_tools
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

module BuildTools
  module Customizations

    @api_customizations = {}
    @doc_customizations = {}
    @example_customizations = {}
    @smoke_customizations = {}

    class << self

      def api(svc_name, &b
    
      def dynamodb_example_deep_transform(subsegment, keys)
        if subsegment.is_a?(Hash)
          if subsegment.keys.size == 1 && keys.include?(subsegment.keys.first)
            subsegment[subsegment.keys.first] # reduce to value only
          else
            subsegment.each do |key, value|
              subsegment[key] = dynamodb_example_deep_transform(value, keys)
            end
          end