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: application.rb
    path of file: ./repos/launchy/lib/launchy
    
    the code of the file until where you have to start completion: require 'set'
module Launchy
  #
  # Application is the base class of all the application types that launchy may
  # invoke. It essentially defin
    
      def find_executable( bin, *paths )
        paths = Launchy.path.split( File::PATH_SEPARATOR ) if paths.empty?
        paths.each do |path|
          file = File.join( path, bin )
          if File.executable?( file ) then
            Launchy.log "#{self.name} : found executable #{file}"
            return file
          end
        end