docs: def get_leaf(attribute, namespace_splitter=NAMESPACE_SPLITTER):
      """
      Returns given attribute leaf.
  
      Usage::
  
          >>> get_leaf("grandParent|parent|child")
          u'child'
  
      :param attribute: Attribute.
      :type attribute: unicode
      :param namespace_splitter: Namespace splitter character.
      :type namespace_splitter: unicode
      :return: Attribute foundations.namespace.
      :rtype: unicode
      """
  
      return foundations.common.get_last_item(attribute.split(namespace_splitter))