The layer manager root (.gl-layer-manager).
The main wrapper holding the header and body wrappers.
The header wrapper. Insert after this node and before the body wrapper:
the body is emptied on every renderSections() call
(render-sections.ts → clearElementFast), so anything mounted inside it
disappears the first time a layer is toggled.
Detail payload of the
geoleaf:layer-manager:panelseam event.