[Puppet Users] Puppet type provider help?

[Jason McMahan]

Good day, 
I am reviewing a type and provider and would like input or help to better 
understand.

The provider is 
require 'puppet/util'
Puppet::Type.type(:winad_group).provide(:powershell) do
    confine :operatingsystem => :windows
    defaultfor :operatingsystem => :windows

    commands :powershell => Puppet::Util::Powershell.getPowershellCommand

The type is 
Puppet::Type.newtype(:winad_group) do

Then lastly there is a file /puppet/util/powershell.rb
class Powershell
  def self.getPowershellCommand()
    if 
File.exists?("#{ENV['SYSTEMROOT']}\\sysnative\\WindowsPowershell\\v1.0\\powershell.exe")
      
"#{ENV['SYSTEMROOT']}\\sysnative\\WindowsPowershell\\v1.0\\powershell.exe"
    elsif 
File.exists?("#{ENV['SYSTEMROOT']}\\system32\\WindowsPowershell\\v1.0\\powershell.exe")
      
"#{ENV['SYSTEMROOT']}\\system32\\WindowsPowershell\\v1.0\\powershell.exe"
    else
      'powershell.exe'
    end
  end
end

If i copy the syntax 
    commands :powershell => 
    if 
File.exist?("#{ENV['SYSTEMROOT']}\\sysnative\\WindowsPowershell\\v1.0\\powershell.exe")
      
"#{ENV['SYSTEMROOT']}\\sysnative\\WindowsPowershell\\v1.0\\powershell.exe"
    elsif 
File.exist?("#{ENV['SYSTEMROOT']}\\system32\\WindowsPowershell\\v1.0\\powershell.exe")
      
"#{ENV['SYSTEMROOT']}\\system32\\WindowsPowershell\\v1.0\\powershell.exe"
    else
      'powershell.exe'
    end

Into my provider i am able to run the command correctly, why can i not 
autoload the powershell.rb file and properly use it across multiple 
providers?

Thank you for any help.

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