lib/Model/GatewayAttributes.php
public function setDirection($direction)
    {
        $allowed_values = array('DIVERGENT', 'CONVERGENT', 'MIXED');
        if (!in_array($direction, $allowed_values)) {
            throw new \InvalidArgumentException("Invalid value for 'direction', must be one of 'DIVERGENT', 'CONVERGENT', 'MIXED'");
        }
        $this->container['direction'] = $direction;

        return $this;
    }
public function setDirection($direction)
    {
        $allowed_values = array('DIVERGENT', 'CONVERGENT', 'MIXED');
        if (!in_array($direction, $allowed_values)) {
            throw new \InvalidArgumentException("Invalid value for 'direction', must be one of 'DIVERGENT', 'CONVERGENT', 'MIXED'");
        }
        $this->container['direction'] = $direction;

        return $this;
    }
Sets direction
@param string $direction
@return $this