s="sidebar-container sidebar-offcanvas"><nav id=sidebar aria-label="Section Navigation"><div class=directory><div class=card><button class="header dynamic" id=card17 title="Learn about the different parts of the Istio system and the abstractions it uses." aria-controls=card17-body><svg class="icon concepts"><use xlink:href="/v1.9/img/icons.svg#concepts"/></svg>Concepts</button><div class=body aria-labelledby=card17 role=region id=card17-body><ul role=tree aria-expanded=true class=leaf-section aria-labelledb