/**
  * Gets all the descendants (ie, children or children of children etc) that
  * are of the type 'tax'
  * @return EE_Line_Item[]
  */
 function tax_descendants()
 {
     EE_Registry::instance()->load_helper('Line_Item');
     return EEH_Line_Item::get_tax_descendants($this);
 }
 /**
  * Gets all the descendants (ie, children or children of children etc) that
  * are of the type 'tax'
  * @return EE_Line_Item[]
  */
 function tax_descendants()
 {
     return EEH_Line_Item::get_tax_descendants($this);
 }