Function getAssetAccessor

CesiumAsync/test/ExamplesAsyncSystem.cpp:50–75

//! [async-system-singleton]

std::shared_ptr<CesiumAsync::IAssetAccessor> getAssetAccessor() {
  static std::shared_ptr<CesiumAsync::IAssetAccessor> pAssetAccessor =
      std::make_shared<SimpleAssetAccessor>(
          std::map<std::string, std::shared_ptr<SimpleAssetRequest>>{
              {"https://example.com",
               std::make_shared<SimpleAssetRequest>(
                   "GET",
                   "https://example.com",
                   CesiumAsync::HttpHeaders(),
                   std::make_unique<SimpleAssetResponse>(
                       uint16_t(200),
                       "text/html",
                       CesiumAsync::HttpHeaders(),
                       std::vector<std::byte>()))},
              {"http://example.com/image.png",
               std::make_shared<SimpleAssetRequest>(
                   "GET",
                   "https://example.com",
                   CesiumAsync::HttpHeaders(),
                   std::make_unique<SimpleAssetResponse>(
                       uint16_t(200),
                       "image.png",
                       CesiumAsync::HttpHeaders(),
                       std::vector<std::byte>()))}});
  return pAssetAccessor;
}

struct ProcessedContent {
  static ProcessedContent createFailed(const std::string& message) {