code: function Untar(opts, cb) {
  		if (typeof opts === 'function') {
  			cb = opts;
  			opts = {};
  		}
  
  		// I should probably actually add some options...
  		opts = opts || {};
  
  		this.fileTypes = filterDecoder(opts.filter);
  
  		this.cb = cb;
  	}
docs: /*
  Extract data from an input.
  
  @param opts- object of options
  @param cb- callback for each file