code: function arrayToList ( arr ) {
  	const length = arr.length;
  	const data = new types.List(length);
  	for ( let i = 0; i < length; i++ ) {
  		data.setValue(i, setJsonValueToSassValue(arr[i]));
  	}
  	return data;
  }
docs: @param  {Array} arr
  
  @return {sass.types.List}