WsdlToPhp\PackageGenerator\Model\Method::setParameterType PHP Method

    public function setParameterType($parameterType)
    {
        $this->parameterType = $parameterType;
        return $this;
    }

 /**
  * @see \WsdlToPhp\PackageGenerator\Parser\Wsdl\AbstractTagInputOutputParser::setKnownType()
  * @return TagInput
  */
 protected function setKnownType(Method $method, $knownType)
 {
     $method->setParameterType($knownType);
     return $this;
 }