/// <reference types='node' />

export = eml2png

interface Options { }

declare class eml2png {
    constructor(opts?: {
        interval?: number,
        maxWorkers?: number,
    })

    public getHtmlStrFromFile(input: NodeJS.ReadableStream | string): Promise<NodeJS.ReadStream | string | undefined>

    public png(input: NodeJS.ReadableStream | string, options?: Options, output?: string): Promise<NodeJS.ReadStream | string | undefined>
}