ublic function morphedByMany($related, $name, $table = null, $foreignPivotKey = null,
                                  $relatedPivotKey = null, $parentKey = null, $relatedKey = null, $relation = null)
    {
        $foreignPivotKey = $foreignPivotKey ?: $this->getForeignKey();

        // For the inverse of the polymorphic many-to-many relations, we will change
        // the way we determine the foreign and other keys, as it is the opposite
        // of the morph-to-many method since we're figuring out these inverses.
        $relatedPivotKey = $relatedPivotKey ?: $name.'_id';

        return $this->morphToMany(
            $related, $name, $table, $foreignPivotKey,
            $relatedPivotKey, $parentKey, $relatedKey, $relation, true
        );
    }

    /**
     * Get the relationship name of the belongsToMany relationship.
     *
     * @return string|null
     */
    protected function guessBelongsToManyRelation()
    {
        $caller = Arr::first(debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS), function ($trace) {
            return ! in_array(
                $trace['function'],
                array_merge(static::$manyMethods, ['guessBelongsToManyRelation'])
            );
        });

        return ! is_null($caller) ? $caller['function'] : null;
    }

    /**
     * Get the joining table name for a many-to-many relation.
     *
     * @param  string  $related
     * @param  \NinjaTables\Framework\Database\Orm\Model|null  $instance
     * @return string
     */
    public function joiningTable($related, $instance = null)
    {
        // The joining table name, by convention, is simply the snake cased models
        // sorted alphabetically and concatenated with an underscore, so we can
        // just sort the models and join them together to get the table name.
        $segments = [
            $instance ? $instance->joiningTableSegment()
                      : Str::snake(static::classBasename($related)),
            $this->joiningTableSegment(),
        ];

        // Now that we have the model names in an array we can just sort them and
        // use the implode function to join them together with an underscores,
        // which is typically used by convention within the database system.
        sort($segments);

        return strtolower(implode('_', $segments));
    }

    /**
     * Get this model's half of the intermediate table name for belongsToMany relationships.
     *
     * @return string
     */
    public function joiningTableSegment()
    {
        return Str::snake(static::classBasename($this));
    }

    /**
     * Determine if the model touches a given relation.
     *
     * @param  string  $relation
     * @return bool
     */
    public function touches($relation)
    {
        return in_array($relation, $this->getTouchedRelations());
    }

    /**
     * Touch the owning relations of the model.
     *
     * @return void
     */
    public function touchOwners()
    {
        foreach ($this->getTouchedRelations() as $relation) {
            $this->$relation()->touch();

            if ($this->$relation instanceof self) {
                $this->$relation->fireModelEvent('saved', false);

                $this->$relation->touchOwners();
            } elseif ($this->$relation instanceof Collection) {
                $this->$relation->each->touchOwners();
            }
        }
    }

    /**
     * Get the polymorphic relationship columns.
     *
     * @param  string  $name
     * @param  string  $type
     * @param  string  $id
     * @return array
     */
    protected function getMorphs($name, $type, $id)
    {
        return [$type ?: $name.'_type', $id ?: $name.'_id'];
    }

    /**
     * Get the class name for polymorphic relations.
     *
     * @return string
     */
    public function getMorphClass()
    {
        $morphMap = Relation::morphMap();

        if (! empty($morphMap) && in_array(static::class, $morphMap)) {
            return array_search(static::class, $morphMap, true);
        }

        if (static::class === Pivot::class) {
            return static::class;
        }

        if (Relation::requiresMorphMap()) {
            throw new ClassMorphViolationException($this);
        }

        return static::class;
    }

    /**
     * Create a new model instance for a related model.
     *
     * @param  string  $class
     * @return mixed
     */
    protected function newRelatedInstance($class)
    {
        return Helper::tap(new $class, function ($instance) {
            if (! $instance->getConnectionName()) {
                $instance->setConnection($this->connection);
            }
        });
    }

    /**
     * Create a new model instance for a related "through" model.
     *
     * @param  string  $class
     * @return mixed
     */
    protected function newRelatedThroughInstance($class)
    {
        return new $class;
    }

    /**
     * Get all the loaded relations for the instance.
     *
     * @return array
     */
    public function getRelations()
    {
        return $this->relations;
    }

    /**
     * Get a specified relationship.
     *
     * @param  string  $relation
     * @return mixed
     */
    public function getRelation($relation)
    {
        return $this->relations[$relation];
    }

    /**
     * Determine if the given relation is loaded.
     *
     * @param  string  $key
     * @return bool
     */
    public function relationLoaded($key)
    {
        return array_key_exists($key, $this->relations);
    }

    /**
     * Set the given relationship on the model.
     *
     * @param  string  $relation
     * @param  mixed  $value
     * @return $this
     */
    public function setRelation($relation, $value)
    {
        $this->relations[$relation] = $value;

        return $this;
    }

    /**
     * Unset a loaded relationship.
     *
     * @param  string  $relation
     * @return $this
     */
    public function unsetRelation($relation)
    {
        unset($this->relations[$relation]);

        return $this;
    }

    /**
     * Set the entire relations array on the model.
     *
     * @param  array  $relations
     * @return $this
     */
    public function setRelations(array $relations)
    {
        $this->relations = $relations;

        return $this;
    }

    /**
     * Duplicate the instance and unset all the loaded relations.
     *
     * @return $this
     */
    public function withoutRelations()
    {
        $model = clone $this;

        return $model->unsetRelations();
    }

    /**
     * Unset all the loaded relations for the instance.
     *
     * @return $this
     */
    public function unsetRelations()
    {
        $this->relations = [];

        return $this;
    }

    /**
     * Get the relationships that are touched on save.
     *
     * @return array
     */
    public function getTouchedRelations()
    {
        return $this->touches;
    }

    /**
     * Set the relationships that are touched on save.
     *
     * @param  array  $touches
     * @return $this
     */
    public function setTouchedRelations(array $touches)
    {
        $this->touches = $touches;

        return $this;
    }
}