symbol">&lt;</span
                        ><span class="tsd-signature-type">string</span
                        ><span class="tsd-signature-symbol">, </span
                        ><span class="tsd-signature-type">undefined</span
                        ><span class="tsd-signature-symbol"> | </span
                        ><span class="tsd-signature-type">string</span
                        ><span class="tsd-signature-symbol">&gt;</span
                        ><span class="tsd-signature-symbol">
      