/// <reference types="express-serve-static-core" />
/// <reference types="node" />
export interface SourceOptions {
    exactPathMatch?: boolean;
    pathMatchFileTypes?: string[];
}
export declare const DEFAULT_SOURCE_OPTIONS: {
    exactPathMatch: boolean;
    pathMatchFileTypes: string[];
};
export declare class FileNotFoundError extends Error {
    key: string;
    constructor(message: string, key: string);
}
export declare class BaseSource {
    options: SourceOptions;
    constructor(options?: SourceOptions);
    get(_key: string, _req?: Express.Request): Promise<Buffer>;
}