export interface MinFileSizeRestriction {
    min: number;
}
export interface MaxFileSizeRestriction {
    max: number;
}
export interface RangeFileSizeRestrictions {
    min: number;
    max: number;
}
export declare type FileSizeRestrictions = MinFileSizeRestriction | MaxFileSizeRestriction | RangeFileSizeRestrictions;
export declare function isMinFileSizeRestrictions(value: any): value is MinFileSizeRestriction;
export declare function isMaxFileSizeRestrictions(value: any): value is MaxFileSizeRestriction;
export declare function isRangeFileSizeRestrictions(value: any): value is RangeFileSizeRestrictions;