function Start-ServicesChocolateyOnly {
<#
.SYNOPSIS
  Starts Chocolatey services by tier.

.DESCRIPTION
  Starts Chocolatey services by tier.  Maximum parallelism can be controlled with the maxParallel parameter

.PARAMETER maxParallel
  [int] Can be an int value from 1 to [int]::MaxValue.  Limits service start parallelism

.EXAMPLE
Start-ServicesChocolateyOnly

[Get-ChocolateyServices] : Finding services installed out of the chocolatey path: C:\ProgramData\chocolatey
[Get-ChocolateyServices] : Found 4 chocolatey services.
[Get-ChocolateyServicesToStart] : Found 4 Chocolatey Services
[Start-ServicesChocolateyOnly] : Starting 2 Services in Tier 0
[Start-ServicesInParallel] : Starting Service Alkami.Services.Subscriptions.Host
[Start-ServicesInParallel] : Starting Service Alkami.MicroServices.Broker.Host

[Start-ServicesInParallel] : Done Starting Services
[Start-ServicesChocolateyOnly] : Tier 0 took 00:00:27.3150594 to start
[Start-ServicesChocolateyOnly] : Starting 1 Services in Tier 1
[Start-ServicesInParallel] : Starting Service Alkami.MicroServices.Authorization.Service.Host

[Start-ServicesInParallel] : Done Starting Services
[Start-ServicesChocolateyOnly] : Tier 1 took 00:00:14.5806190 to start
[Start-ServicesChocolateyOnly] : Starting 1 Services in Tier 2
[Start-ServicesInParallel] : Starting Service Alkami.MicroServices.Features.Beacon.Host

[Start-ServicesInParallel] : Done Starting Services
[Start-ServicesChocolateyOnly] : Tier 2 took 00:00:13.4367245 to start
[Start-ServicesChocolateyOnly] : Done starting services.
#>
    [CmdletBinding()]
    [OutputType([void])]
    Param(
        [Parameter(Mandatory = $false)]
        [ValidateRange(1, [int]::MaxValue)]
        [int]$maxParallel = 10
    )

    $loglead = Get-LogLeadName

    [array]$stoppedChocolateyServices = Get-ChocolateyServicesToStart

    if (Test-IsCollectionNullOrEmpty -Collection $stoppedChocolateyServices) {

        Write-Warning "$logLead : No Chocolatey Services Found to Start"
        return
    }

    # This takes all stopped Choco services, groups them by the property Tier, then forces Tier as an Int to sort numerically ascending
    # to enforce Tier 0 starts before Tier 1 before Tier 2, etc.
    $groupedChocolateyServices = $stoppedChocolateyServices | Group-Object -Property Tier | Sort-Object @{e={$_.Name -as [int]}}

    foreach ($group in $groupedChocolateyServices) {

        $services = $group.Group | Select-Object -ExpandProperty ServiceName

        Write-Host "$logLead : Starting $($group.Count) Service(s) in Tier $($group.Name)"
        $tierStopWatch = [System.Diagnostics.StopWatch]::StartNew()
        Start-ServicesInParallel -serviceNamestoStart $services -maxParallel $maxParallel
        Write-Host "$logLead : Tier $($group.Name) took $($tierStopWatch.Elapsed) to start"
        $tierStopWatch.Stop()
    }

    Write-Host "$loglead : Done starting services."
}