><span class="parameters "><span class="parameter ">other<span class="token operator">: </span><a href="index.html">NotBlankString</a></span></span><span class="token punctuation">)</span><span class="token operator">: </span><a href="index.html">NotBlankString</a></div><div class="brief "><p class="paragraph">Concatenates this string with the <a href="../plus.html">other</a> one.</p></div><div class="symbol monospace"><div class="block"><div class="block"><span class="token annotation builtin">@</span><spa