functions/customSecurityAttributes/attributeSets/Register-TmfAttributeSet.ps1

function Register-TmfAttributeSet
{
    [CmdletBinding()]
    Param (
        [Parameter(Mandatory = $true)]
        [string] $displayName,
        [Parameter(Mandatory = $true)]
        [string] $description,
        [Parameter(Mandatory = $true)]
        [int] $maxAttributesPerSet,
        [bool] $present = $true,
        [string] $sourceConfig = "<Custom>",

        [System.Management.Automation.PSCmdlet]
        $Cmdlet = $PSCmdlet
    )
    
    begin
    {
        $resourceName = "attributeSets"
        if (!$script:desiredConfiguration[$resourceName]) {
            $script:desiredConfiguration[$resourceName] = @()
        }

        if ($script:desiredConfiguration[$resourceName].displayName -contains $displayName) {            
            $alreadyLoaded = $script:desiredConfiguration[$resourceName] | Where-Object {$_.displayName -eq $displayName}
        }

    }
    process
    {
        if (Test-PSFFunctionInterrupt) { return }                

        $object = [PSCustomObject]@{        
            displayName = $displayName
            description = $description
            maxAttributesPerSet = $maxAttributesPerSet
            present = $present
            sourceConfig = $sourceConfig
        }
    
        Add-Member -InputObject $object -MemberType ScriptMethod -Name Properties -Value { ($this | Get-Member -MemberType NoteProperty).Name }

        if ($alreadyLoaded) {
            $script:desiredConfiguration[$resourceName][$script:desiredConfiguration[$resourceName].IndexOf($alreadyLoaded)] = $object
        }
        else {
            $script:desiredConfiguration[$resourceName] += $object
        }
    }
}