Clarification on Typescript interface when using generics

Question

I have got an object called datum which is of type HierarchyPointNode<TreeNodeDatum>

datum: HierarchyPointNode<TreeNodeDatum>

HierarchyPointNode and TreeNodeDatum are imported as follows:

import { TreeNodeDatum } from 'react-d3-tree/lib/types/common';
import { HierarchyPointNode } from 'd3-hierarchy';

I want to save datum to another object node and I need to create type definitions for this object node. May I know how do I do it?

// declare types for node

interface node{
    // How to find types of datum and use the same here?
}

When I console.log(datum), I get this

{
    "data": {
        "name": "CAMPAIGN",
        "attributes": {},
        "children": [],
        "__rd3t": {
            "id": "cad115be-5f96-407d-833b-9e20377d9079",
            "depth": 0,
            "collapsed": false
        }
    },
    "height": 0,
    "depth": 0,
    "parent": null,
    "x": 0,
    "y": 0
}

Interface of <TreeNodeDatum>

export interface RawNodeDatum {
    name: string;
    attributes?: Record<string, string | number | boolean>;
    children?: RawNodeDatum[];
}
export interface TreeNodeDatum extends RawNodeDatum {
    children?: TreeNodeDatum[];
    __rd3t: {
        id: string;
        depth: number;
        collapsed: boolean;
    };
}

Interface of HierarchyPointNode

export interface HierarchyPointNode<Datum> extends HierarchyNode<Datum> {
    /**
     * The x-coordinate of the node.
     */
    x: number;

    /**
     * The y-coordinate of the node.
     */
    y: number;

    /**
     * Returns an array of links for this node, where each link is an object that defines source and target properties.
     * The source of each link is the parent node, and the target is a child node.
     */
    links(): Array<HierarchyPointLink<Datum>>;
}