function render (options, { data, content, excerpt, renderers, components, prefix = 'entry-' }) {
  if (data.mimeType === 'text/markdown') {
    const hast = JSON.parse(JSON.stringify(content))
    const p = unified()
      .use(extractExcerpt(options)(excerpt))
      .use(stringify)
      .use(reactRenderer, {
        createElement: React.createElement,
        prefix,
        components: components || renderers
      })

    return p.stringify(p.runSync(hast))
  }
}
render
@param {Object} options
@param {String} options.excerpt Default excerpt selector to be used in Content when excerpt is set to true.
It must be a valid `unist-util-select` selector. Default to ':root > element[tagName=p]' (first paragraph).
@param {Object} contentConfig