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: platform_list.rb
    path of file: ./repos/metasploit-framework/lib/msf/core/module
    
    the code of the file until where you have to start completion: #!/usr/bin/env ruby
# -*- coding: binary -*-

#
# This is a helper to an easy way to specify support platforms.  It will take a
# list of strings or Msf::Module::Platform objects and build them into a list
# of Msf::Module::Platform objects.  It also supports ranges based on relative
# ranks...
#


class Msf::Module::PlatformList
  attr_accessor :platforms

  #
  # Returns the win32 p
    
  def initialize(*args)
    self.platforms = [ ]

    args.each { |a|
      if a.kind_of?(String)
        platforms << Msf::Module::Platform.find_platform(a)
      elsif a.kind_of?(Range)
        b = Msf::Module::Platform.find_platform(a.begin)
        e = Msf::Module::Platform.find_platform(a.end)

        children = b.superclass.find_children
        r        = (b::Rank .. e::Rank)
        children.each { |c|
          platforms << c if r.include?(c::Rank)
        }
      else
        platforms << a
      end