export declare function convertToUnit(str: string | number | null | undefined, unit?: string): string | undefined;
export declare const getRefElement: (ref: HTMLElement | Element | {
    '$el': HTMLElement;
}) => HTMLElement | Element | null;
export declare const resolveFieldData: (obj: any, field: any, defaultValue?: any) => any;
export declare const getFileSize: (bytes: number, decimals?: number) => (number | string)[] | string;
