public function configure(array $modelConfigurations) {
        if (empty($modelConfigurations)) {
            throw new \LogicException('Supply at least one model or model configuration!');
        }

        /* First define the models and their columns. */
        foreach ($modelConfigurations as $className) {

            $modelClass = $className;

            if (is_subclass_of($className, 'Illuminate\Database\Eloquent\Model')) {
                $config = new ModelConfig();
                $config->setModelClass($modelClass);
            }
            else if (is_subclass_of($className, 'Label305\AujaLaravel\Config\ModelConfig')) {
                $config = new $className();
                $modelClass = $config->getModelClass();
            }
            else {
                throw new \InvalidArgumentException(
                    "Model configuration should be class name string of either a ModelConfig or Eloquent subclass."
                );
            }

            $model = new Model($modelClass);
            $this->models[$modelClass] = $model;
            $this->relations[$modelClass] = [];

            $configResolver = new ConfigResolver($config, $model);
            $this->configs[$modelClass] = $configResolver->resolve();
            $this->findColumns($this->models[$modelClass]);
            $this->configs[$modelClass] = $configResolver->resolve(); // TODO: Find a workaround for doing this twice.
        }

        /* Find relations */
        $this->findRelations(array_values($this->models));
    }