private function resolveTrailing($base, $add = true)
	{
		return $this->updateTrailing('lft', $base, $add)
		            ->updateTrailing('rgt', $base, $add);
	}
private function resolveTrailing($base, $add = true)
	{
		return $this->updateTrailing('lft', $base, $add)
		            ->updateTrailing('rgt', $base, $add);
	}
private function resolveTrailing ( $ base , $ add = true ) { return $ this -> updateTrailing ( 'lft' , $ base , $ add ) -> updateTrailing ( 'rgt' , $ base , $ add ) ; }
Resolves the trailing left and right values for the new model

@param   int    $base  The base level after which values should be changed
@return  $this
@since   2.1.0
Resolves the trailing left and right values for the new model