question: return an iterator of all children of this node . if there are no children , an empty iterator is returned . concode_field_sep String name concode_elem_sep HashMap attributes concode_elem_sep TreeNode parent concode_elem_sep String body concode_elem_sep ArrayList children concode_field_sep TreeNode findChild concode_elem_sep String findAttribute concode_elem_sep String getName concode_elem_sep void addAttribute concode_elem_sep String getBody concode_elem_sep Iterator findAttributes concode_elem_sep String toString concode_elem_sep void toString concode_elem_sep void removeAttribute concode_elem_sep void setBody concode_elem_sep void addChild concode_elem_sep void removeNode
target: Iterator function ( ) { if ( children == null ) return ( Collections . EMPTY_LIST . iterator ( ) ) ; else return ( children . iterator ( ) ) ; }