joomla-framework / form

	 * @since   1.0

	 * @throws  \UnexpectedValueException

	 */

	public function removeField($name, $group = null)

	{

		// Make sure there is a valid Form XML document.

		if (!($this->xml instanceof \SimpleXMLElement))

		{

			throw new \UnexpectedValueException(sprintf('%s::getFieldAttribute `xml` is not an instance of SimpleXMLElement', get_class($this)));

		}

		// Find the form field element from the definition.

		$element = $this->findField($name, $group);

		// If the element exists remove it from the form definition.

		if ($element instanceof \SimpleXMLElement)

		{

			$dom = dom_import_simplexml($element);

			$dom->parentNode->removeChild($dom);

		}

		return true;

	}

	/**

	 * Method to remove a group from the form definition.

	 * @since   1.0

	 * @throws  \UnexpectedValueException

	 */

	public function setFieldAttribute($name, $attribute, $value, $group = null)

	{

		// Make sure there is a valid Form XML document.

		if (!($this->xml instanceof \SimpleXMLElement))

		{

			throw new \UnexpectedValueException(sprintf('%s::getFieldAttribute `xml` is not an instance of SimpleXMLElement', get_class($this)));

		}

		// Find the form field element from the definition.

		$element = $this->findField($name, $group);

		// If the element doesn't exist return false.

		if (!($element instanceof \SimpleXMLElement))

		{

			return false;

		}

		else

		// Otherwise set the attribute and return true.

		{

			$element[$attribute] = $value;

			// Synchronize any paths found in the load.

			$this->syncPaths();

			return true;

		}

	}

	/**

	 * Method to set some field XML elements to the form definition.  If the replace flag is set then