Jenssegers\Model\Model::setAttribute PHP Method

    public function setAttribute($key, $value)
    {
        // First we will check for the presence of a mutator for the set operation
        // which simply lets the developers tweak the attribute as it is set on
        // the model, such as "json_encoding" an listing of data for storage.
        if ($this->hasSetMutator($key)) {
            $method = 'set' . Str::studly($key) . 'Attribute';
            return $this->{$method}($value);
        }
        if ($this->isJsonCastable($key) && !is_null($value)) {
            $value = $this->asJson($value);
        }
        $this->attributes[$key] = $value;
        return $this;
    }