types/Hashtable.Types.ps1xml

<?xml version="1.0" encoding="utf-8" ?>
<Types>
    <Type>
        <Name>System.Collections.Hashtable</Name>
        <Members>
            <ScriptMethod>
                <Name>Invert</Name>
                <Script>
                    $this | Invoke-ObjectInvert
                </Script>
            </ScriptMethod>
        </Members>
    </Type>
</Types>