src/Support/MessageBag.php
public function get($key)
    {
        if (array_key_exists($key, $this->messages)) {
            return !empty($this->messages[$key]) ? $this->messages[$key] : null;
        }

        return null;
    }
public function get($key)
    {
        if (array_key_exists($key, $this->messages)) {
            return !empty($this->messages[$key]) ? $this->messages[$key] : null;
        }

        return null;
    }
Get all of the messages from a given key.
Returns null if the given key is empty, or
if it doesn't exist.

@param  string $key
@return array|null