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: result_merger.rb
    path of file: ./repos/simplecov/lib/simplecov
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

require "json"

module SimpleCov
  #
  # Singleton that is responsible for caching, loading and merging
  # SimpleCov::Results into a single result for coverage analysis based
  # upon multiple test suites.
  #
  module ResultMerger
    class << self
      # The path to the .resultset.json cache file
      def resultset_path
        File.join(SimpleCov.coverage_path, ".resultset.json")
      end

      def resultset_writelock
        File.join(SimpleCov.coverage_path, ".resultset.json.lock")
      end

      def merge_and_store(*file_paths, ignore_timeout: false)
        result = merge_results(*file_pat
    
      def merge_results(*file_paths, ignore_timeout: false)
        # It is intentional here that files are only read in and parsed one at a time.
        #
        # In big CI setups you might deal with 100s of CI jobs and each one producing Megabytes
        # of data. Reading them all in easily produces Gigabytes of memory consumption which
        # we want to avoid.
        #
        # For similar reasons a SimpleCov::Result is only created in the end as that'd create
        # even more data especially when it also reads in all source files.
        initial_memo = valid_results(file_paths.shift, ignore_timeout: ignore_timeout)

        command_names, coverage = file_paths.reduce(initial_memo) do |memo, file_path|
          merge_coverage(memo, valid_results(file_path, ignore_timeout: ignore_timeout))
        end

        create_result(command_names, coverage)
      end