Eloquent\Phony\Stub\StubVerifier::returnsArgument PHP Method

Negative indices are offset from the end of the list. That is, -1 indicates the last element, and -2 indicates the second last element.

public returnsArgument ( integer $index )
$index	integer	The argument index.

    public function returnsArgument($index = 0)
    {
        $this->stub->returnsArgument($index);
        return $this;
    }

StubVerifier