function abs_pop(){
		$Node = $this->abs_end();
		if( is_null($Node->pidx) ){
			// cannot pop self from self
			return false;
		}
		// pop node from it's parent
		return $Node->get_parent()->pop();
	}
function abs_pop(){
		$Node = $this->abs_end();
		if( is_null($Node->pidx) ){
			// cannot pop self from self
			return false;
		}
		// pop node from it's parent
		return $Node->get_parent()->pop();
	}
function abs_pop ( ) { $ Node = $ this -> abs_end ( ) ; if ( is_null ( $ Node -> pidx ) ) { // cannot pop self from self return false ; } // pop node from it's parent return $ Node -> get_parent ( ) -> pop ( ) ; }
Recursively pop last element from extremity tree
@return ParseNode
Recursively pop last element from extremity tree