PowerShell Bounded Worker Pool with ForEach-Object Parallel

function Invoke-WorkerPool {
    param(
        [Parameter(Mandatory)][object[]]$Items,
        [Parameter(Mandatory)][scriptblock]$Worker,
        [ValidateRange(1, 64)][int]$ThrottleLimit = 4
    )
    $results = $Items | ForEach-Object -Parallel {
        $work = $using:Worker
        $item = $_
        try {
            [pscustomobject]@{ Item = $item; Ok = $true; Value = (& $work $item); Error = $null }
        } catch {
            [pscustomobject]@{ Item = $item; Ok = $false; Value = $null; Error = $_.Exception.Message }
        }
    } -ThrottleLimit $ThrottleLimit
    [pscustomobject]@{
        Results = @($results | Where-Object { $_.Ok })
        Errors  = @($results | Where-Object { -not $_.Ok })
    }
}