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

module Puppet::Parser::Files
  module_function

  # Return a list of manifests as absolute filenames matching the given
  # pattern
    
  def find_in_module(reference, environment)
    if Puppet::Util.absolute_path?(reference)
      reference
    else
      path, file = split_file_path(reference)
      mod = environment.module(path)

      if file && mod
        yield(mod, file)
      else
        nil
      end