import type { DynamicModule } from '@nestjs/common';
import type { ClassConstructor } from 'class-transformer';
export interface SelectConfigOptions {
    /**
     * when true, allow undefined config declared with `@IsOptional()`
     */
    allowOptional?: boolean;
}
export declare const selectConfig: <T, Option extends SelectConfigOptions>(module: DynamicModule, Config: ClassConstructor<T>, options?: Option | undefined) => Option extends {
    allowOptional: true;
} ? T | undefined : T;