 class="token operator">:</span> GraphQLInterpreter<span class="token punctuation">[</span>MyEnv<span class="token punctuation">,</span> <span class="token builtin">String</span><span class="token punctuation">]</span> <span class="token operator">=</span> i<span class="token punctuation">.</span>mapError<span class="token punctuation">(</span>_<span class="token punctuation">.</span>toString<span class="token punctuation">)</span>

<span class="token comment">// provide the environment</span>
<span class="