in src/components/base/form/form_checkbox_tree/models/tree.js [152:163]
toggleOption({ value }, checked, propagateToParent = true) {
const node = this.getNode(value);
Tree.toggleNodeState(node, checked);
if (node.isChild && propagateToParent) {
this.toggleParentOption(node.parent);
}
if (node.isParent) {
node.children.forEach((child) => this.toggleOption(child, checked, false));
}
}