<svg viewBox="0 0 24 24"><use href="#icon-anchor"></use></svg></a></h3><ul class="tsd-signatures"><li class="tsd-signature tsd-anchor-link"><a id="getHeader.getHeader-1" class="tsd-anchor"></a><span class="tsd-kind-call-signature">get<wbr/>Header</span><span class="tsd-signature-symbol">(</span><span class="tsd-kind-parameter">lowerCaseKey</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">string</span><a href="#getHeader.getHeader-1