PowerShell : GetNewClosure() and Cmdlets with validation

Question

I\'m trying to understand how .GetNewClosure() works within the context of a script cmdlet in PowerShell 2.

In essence I have a function that returns an object like

Answer 1

I believe this might work:

function Get-AnObject {
param(
      [CmdletBinding()]
      [Parameter(....)]
      [String[]]$Id
      ..
      [ValidateSet('Option1','Option2')]
      [String[]]$Options
    )

...
$sb = [scriptblock]::create('$this | Get-ExpensiveStuff')
$T = New-Object PSCustomObject -Property @{ ..... } 
$T | Add-Member -MemberType ScriptProperty -Name ExpensiveScriptProperty -Value $sb 

.. }

That delays creation of the script block until run time.