in src/agent.ts [173:186]
function createPacProxyAgent(
resolver: FindProxyForURL,
opts?: createPacProxyAgent.PacProxyAgentOptions
): _PacProxyAgent {
if (!opts) {
opts = {};
}
if (typeof resolver !== 'function') {
throw new TypeError('a resolve function must be specified!');
}
return new _PacProxyAgent(resolver, opts);
}