export declare function isVector2(obj: {
    x: number;
    y: number;
}): boolean;
export declare function isVector3(obj: {
    x: number;
    y: number;
    z: number;
}): boolean;
export declare function isEuler(obj: {
    x: number;
    y: number;
    z: number;
    isEuler?: boolean;
}): boolean | undefined;