Strange command names in FM-10

[Klaus Daube]

Dear all,

While working on the Enhanced Tool Bars for FM-10 i discovered some strange command names in cmds.cfg 
of FM-10 (well it is the last beta release M7):

<Command ShowTCBookSeachable               <Labe Book>
<Command ShowTCDitaMapSeachable            <Label DITA Map>
<Command ShowTCSelSeachable                <Label Selected Documents>

What could that Seachable be ?

Klaus Daube
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