export function extendObject(dest: any, ...sources: any[]): any {
    if (dest == null) {
        throw TypeError('Cannot convert undefined or null to object');
    }

    for (const source of sources) {
        if (source) {
            sourceHasOwnProperty(dest, source);
        }
    }

    return dest;
}

function sourceHasOwnProperty(dest, source): any {
    for (const key in source) {
        if (source.hasOwnProperty(key)) {
            dest[key] = source[key];
        }
    }
}