src/LightSaml/Model/Assertion/ProxyRestriction.php
public function addAudience($audience)
    {
        if (false == is_array($this->audience)) {
            $this->audience = array();
        }
        $this->audience[] = (string) $audience;

        return $this;
    }
public function addAudience($audience)
    {
        if (false == is_array($this->audience)) {
            $this->audience = array();
        }
        $this->audience[] = (string) $audience;

        return $this;
    }
@param string $audience

@return ProxyRestriction