code: function extract(str, options, tranformFn) {
    let extractor = new Extractor(options, tranformFn);
    return extractor.extract(str);
  }
docs: Extract comments from the given `string`.
  
  ```js
  const extract = require('extract-comments');
  console.log(extract(string, options));
  ```
  @param {String} `string`
  @param {Object} `options` Pass `first: true` to return after the first comment is found.
  @param {Function} `tranformFn` (optional) Tranform function to modify each comment
  @return {Array} Returns an array of comment objects
  @api public