code: function (fp, opts, cb) {
      if (typeof fp !== 'string') {
        cb = opts;
        opts = fp;
        fp = null;
      }
      if (typeof opts === 'function') {
        cb = opts;
        opts = {};
      }
      if (typeof cb !== 'function') {
        throw new Error('expected a callback function.');
      }
  
      var dest = this.dest(fp || this.path, opts);
      var file = { contents: this.content, path: dest };
      opts = extend({ ask: true }, this.options, opts);
      utils.detect(file, opts, function (err) {
        if (file.contents) {
          utils.write(dest, file.contents, cb);
        } else {
          this.copy(dest, cb);
        }
        return this;
      }.bind(this));
      return this;
    }
docs: Asynchronously write the snippet to disk.
  
  @name .write
  @param {String} `fp` Destination filepath.
  @param {Function} `cb` Callback function
  @returns {Object} Returns the instance for chaining.
  @api public