extensions/vscode-web-playground/src/extension.ts
src/vs/workbench/contrib/debug/common/debugProtocol.d.ts

extensions/vscode-web-playground/src/memfs.ts
src/vs/base/common/strings.ts

extensions/vscode-web-playground/src/memfs.ts
src/vs/platform/files/common/inMemoryFilesystemProvider.ts