Improvement to fTemplating

In using the fTemplating class I've found the fTemplating::add() method to be a handy way to encapsulate arrays of display elements that can change from page to page. My use case has a fairly common default, so I set that up in a common init script. I decided that it would be helpful to have a symmetric fTemplating::remove() function to remove a value from an array. An example is provided below.

//In the common init.php

$template = new fTemplating('/path/to/templates/');

//On most pages we will show the a, b, c, and d widgets
$template->set('a-widget', 'widgets/a.widget.php');
$template->set('b-widget', 'widgets/b.widget.php');
$template->set('c-widget', 'widgets/c.widget.php');
$template->set('d-widget', 'widgets/d.widget.php');

$template->add('widgets', 'a-widget');
$template->add('widgets', 'b-widget');
$template->add('widgets', 'c-widget');
$template->add('widgets', 'd-widget');

Then later on in some special page that doesn't show the c-widget for some reason

//Special page, don't show the c-widget

$template->remove('widgets', 'c-widget');
$template->place('widget-panel');

To acheive this I added a method to the fTemplating class following the same code style as the rest of the class.

  /**
   * Removes a value from an array element
   *
   * @param string $element The element to remove from
   * @param mixed  $value   The value to remove
   * @return fTemplating The template object, to allow for method chaining
   */
  public function remove($element, $value) {
    if(!is_array($this->elements[$element])) {
      throw new fProgrammerException(
        '%1$s was called for an element, %2$s, which is not an array',
        'remove()',
        $element
      );
    }
    
    $key = array_search($value, $this->elements[$element]);
    if($key === FALSE) {
      throw new fProgrammerException(
        '%1$s was called for a value, %2$s, which is not in element, %3$s',
        'remove()',
        $value,
        $element
      );
    } else {
      unset($this->elements[$element][$key]);
    }
    
    return $this;
  }

I would like to release this code to be considered for inclusion in the Flourish library.