public void setDiscoveryURIIfUndefined(final String discoveryURI) {
        if (this.discoveryURI == null) {
            this.discoveryURI = discoveryURI;
        }
    }
<p>setDiscoveryURIIfUndefined.</p>

@param discoveryURI a {@link String} object
pac4j-oidc/src/main/java/org/pac4j/oidc/config/OidcConfiguration.java