function Get-ServicesByTier {
<#
.SYNOPSIS
    Returns service names belonging to the specified tier and optionally lower

.PARAMETER Tier
    [-Tier] <int> - Returns a <string[]> containing names of tiered services categorized
        under the provided numbered tier.

.PARAMETER IncludeLowerTiers
    [-IncludeLowerTiers] - Also include services from all tiers lower than the provided tier.
        (With this swtich present, -Tier 0 returns only tier 0 service names, 1 returns both tier 0 and 1 services, 2 returns
        tier 2, 1, and 0, ad infinitum.) Values provided above the number of defined tiers simply returns all available tiered services.
#>
    [CmdletBinding()]
    [OutputType([System.Object])]
    param(
        [Parameter(Mandatory = $true)]
        [ValidateRange(0, [int]::MaxValue)]
        [int]$Tier,

        [Parameter(Mandatory = $false)]
        [switch]$IncludeLowerTiers
    )

    $tiers = Get-MicroserviceTiers

    #Only return a single tier if switch is not present
    if (!($IncludeLowerTiers.IsPresent)) {
        return $tiers[$Tier]
    }

    $currentTier = 0
    $services = @()
    foreach ($servicesArray in $tiers) {
        if ($currentTier++ -le $Tier) { #Tip: ++ happens _after_ evaluation when it's on the right
            $services += $servicesArray
        }
        else {
            break
        }
    }

    return $services
}