import { PipeTransform } from '@nestjs/common';
export declare class NumberPipe implements PipeTransform {
    private readonly title;
    private readonly options?;
    constructor(title: string, options?: Partial<{
        readonly minimum: number;
        readonly maximum: number;
        readonly optional: boolean;
    }> | undefined);
    transform(value: string | number): number | null;
}
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