src/LightSaml/Model/Metadata/IdpSsoDescriptor.php
public function addSingleSignOnService(SingleSignOnService $singleSignOnService)
    {
        if (false == is_array($this->singleSignOnServices)) {
            $this->singleSignOnServices = array();
        }
        $this->singleSignOnServices[] = $singleSignOnService;

        return $this;
    }
public function addSingleSignOnService(SingleSignOnService $singleSignOnService)
    {
        if (false == is_array($this->singleSignOnServices)) {
            $this->singleSignOnServices = array();
        }
        $this->singleSignOnServices[] = $singleSignOnService;

        return $this;
    }
@param SingleSignOnService $singleSignOnService

@return IdpSsoDescriptor