import { PipeTransform } from '@nestjs/common';
export declare class OptionalParseIntPipe implements PipeTransform {
    /**
     * Transforms the given value into a number if it is not already one.
     * If the value is null or undefined, it is returned as is.
     * If the value is a string, it is parsed as a number. If the parsing fails,
     * a BadRequestException is thrown.
     * @param value The value to be transformed.
     * @returns The transformed value.
     * @throws BadRequestException if the value is a string and cannot be parsed as a number.
     */
    transform(value: any): any;
}
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