assimtech / tempo

        $foundNodes = array();

        foreach ($this['nodes'] as $idx => $node) {

            if (!$node instanceof Node\NodeInterface) {

                throw new InvalidArgumentException(sprintf(

                    'property: [nodes] must implement \Assimtech\Tempo\Node\NodeInterface, [nodes][%s] is a %s',

                    $idx,

                    is_object($node) ? get_class($node) : gettype($node)

                ));

            }

            if (in_array((string)$node, $foundNodes)) {

                throw new InvalidArgumentException(sprintf(

        $definition = require $path;

        if (!$definition instanceof Definition) {

            throw new RuntimeException(sprintf(

                "%s must return an instance of \Assimtech\Tempo\Definition (%s returned)",

                $path,

                is_object($definition) ? get_class($definition) : gettype($definition)

            ));

        }

        return $definition;

    }