Method set

packages/joint-core/src/mvc/Data.mjs:24–32

(obj, key, value)

    }

    set(obj, key, value) {
        if (key === undefined) return;
        const data = this.create(obj);
        if (typeof key === 'string') {
            data[key] = value;
        } else {
            Object.assign(data, key);
        }
    }

    remove(obj, key) {
        if (!this.has(obj)) return;