Optional
The source panel's slot name in a multi-panel <perspective-viewer>, so the host can route the selection (e.g. master/detail global filters). undefined for a lone, unslotted viewer.
slot
<perspective-viewer>
undefined
The source panel's
slotname in a multi-panel<perspective-viewer>, so the host can route the selection (e.g. master/detail global filters).undefinedfor a lone, unslotted viewer.