pino logger as fastify plugin

Question

I have been created my own options and stream for fastify logger:

const logger = pino(
{
  level: 'info',
  ...ecsFormat,
},
pinoMultiStream.multistream([
  { stream: streamToElastic },
  {
    stream: pretty({
      colorize: true,
      sync: true,
      ignore: 'pid',
    }),
  },
]),)

const fastify = Fastify({logger})

now I want to extract this options as fastify plugin, how can I do this functionality? If that’s impossible what can I do to extract this code?