openmct/platform/commonUI/general/res/templates/tree-node.html

<span ng-controller="ToggleController as toggle">
    <span ng-controller="TreeNodeController as treeNode">
        <span
	        class="tree-item menus-to-left"
	        ng-class="{selected: treeNode.isSelected()}"
	        >
            <span
	            class='ui-symbol view-control'
				ng-click="toggle.toggle(); treeNode.trackExpansion()"
				ng-if="model.composition !== undefined"
				>
                {{toggle.isActive() ? "v" : ">"}}
            </span>
            <mct-representation
				key="'label'"
				mct-object="domainObject"
				ng-model="ngModel"
				ng-click="ngModel.selectedObject = domainObject"
				>
            </mct-representation>
        </span>
        <span
			class="tree-item-subtree"
			ng-show="toggle.isActive()"
			ng-if="model.composition !== undefined"
			>

            <mct-representation key="'subtree'"
                                ng-model="ngModel"
                                mct-object="treeNode.hasBeenExpanded() && domainObject">
            </mct-representation>

        </span>
    </span>
</span>