primeng/api/treenode.d.ts

export interface TreeNode<T = any> {
    label?: string;
    data?: T;
    icon?: string;
    expandedIcon?: any;
    collapsedIcon?: any;
    children?: TreeNode<T>[];
    leaf?: boolean;
    expanded?: boolean;
    type?: string;
    parent?: TreeNode<T>;
    partialSelected?: boolean;
    styleClass?: string;
    draggable?: boolean;
    droppable?: boolean;
    selectable?: boolean;
    key?: string;
}