src/Shared/Reference/ReferenceTrait.php
protected function checkReferenceLoop(
        /*# int */ $loop,
        /*# string */ $name
    ) {
        if ($loop > 20) {
            throw new RuntimeException(
                Message::get(Message::MSG_REF_LOOP, $name),
                Message::MSG_REF_LOOP
            );
        }
    }
protected function checkReferenceLoop(
        /*# int */ $loop,
        /*# string */ $name
    ) {
        if ($loop > 20) {
            throw new RuntimeException(
                Message::get(Message::MSG_REF_LOOP, $name),
                Message::MSG_REF_LOOP
            );
        }
    }
Throw exception if looped

@param  int $loop loop counter
@param  string $name reference name
@throws RuntimeException if loop found
@access protected
@since  2.0.6