src/Primitive/Container/Container.php
public function get($key, $default = null)
    {
        return Arr::get($this->items, $this->getKey($key), $default);
    }
public function get($key, $default = null)
    {
        return Arr::get($this->items, $this->getKey($key), $default);
    }
Getter. Supports dot notation.

@param mixed $key
@param mixed $default
@return mixed