src/Payum/Core/Bridge/Spl/ArrayObject.php
public function offsetSet($index, $value)
    {
        if ($this->input) {
            $this->input[$index] = $value;
        }

        return parent::offsetSet($index, $value);
    }
public function offsetSet($index, $value)
    {
        if ($this->input) {
            $this->input[$index] = $value;
        }

        return parent::offsetSet($index, $value);
    }
{@inheritDoc}