function Get-Vrf {
    <#
        .SYNOPSIS

        Returns VRF object.

        .DESCRIPTION

        Returns VRF by id. Or leave it empty to get all VRFs.
    #>
    [CmdletBinding(DefaultParameterSetName="NoParams")]
    [OutputType([PS.IPAM.Vrf])]
    param (
        [parameter(
            Mandatory=$true,
            ValueFromPipeline=$true,
            ValueFromPipelineByPropertyName=$true,
            Position=0,
            ParameterSetName="ByID"
        )]
        [ValidateNotNullOrEmpty()]
        [int]
        $Id
    )
    process {
        $_params = @{
            Controller = [PS.IPAM.controllers]::vrf
            Method     = "GET"
            Type       = [PS.IPAM.types]::vrf
        }
        if ($Id) { $_identifiers = @($Id) }

        $_params.Add("Identifiers",$_identifiers)

        Invoke-Request @_params
    }
}
Export-ModuleMember -Function Get-Vrf