src/Session.php
public function merge(string $name, $value) : self
    {
        $data = $this->get($name) ?: [];

        return $this->set($name, array_merge($data, $value));
    }
public function merge(string $name, $value) : self
    {
        $data = $this->get($name) ?: [];

        return $this->set($name, array_merge($data, $value));
    }
@param string $name
@param $value

@return $this|self