function Remove-AlkamiServiceFabricMultipleMajorVersions {
<#
.SYNOPSIS
    Removes multiple major versions of a microservice, preserving the latest major version.
.PARAMETER hostname
    A single server hostname from the target Service Fabric cluster.
#>
    [CmdletBinding()]
    Param(
        [Parameter(Mandatory = $false)]
        [string]$hostname = "localhost"
    )

    $loglead = (Get-LogLeadName);

    Write-Host "$loglead Now removing multiple major microservice versions and keeping the latest version.";

    # Connect to the cluster and grab the deployed applications.
    Connect-AlkamiServiceFabricCluster -hostname $hostname | Out-Null;
    $applications = Get-AlkamiServiceFabricApplications -ComputerName $hostname;

    # Map applications from [packageName -> list of running applications]
    $appMap = @{};
    foreach($app in $applications) {
        if(!($appMap.ContainsKey($app.Name))) {
            $appMap[$app.Name] = @();
        }

        $appMap[$app.Name] = $appMap[$app.Name] + $app;
    }

    # Foreach application running on the cluster...
    $removedAny = $false;
    foreach($key in $appMap.Keys) {
        # Grab the services for the particular app running on the cluster.
        # Sort by name, which also sorts by major version.
        $services = $appMap[$key];
        $services = $services | Sort-Object -Property ServiceFabricApplicationName;

        # If there is more than one version of the service running..
        if($services.Count -gt 1) {
            # Remove everything except for the last service in the list.
            $removeCount = $services.Count - 1;
            for($i = 0; $i -lt $removeCount; $i++) {
                Write-Host "$loglead Removing $($services[$i].ServiceFabricApplicationName)";
                Remove-ServiceFabricApplication -ApplicationName ($services[$i].ServiceFabricApplicationName) -Force;
                $removedAny = $true;
            }
            Write-Host "$loglead $($services[$removeCount].ServiceFabricApplicationName) still lives!`n";
        }
    }
    if(!$removedAny) {
        Write-Host "$loglead Found no microservices to remove.";
    }
}