Fork channel

Create a new channel as a copy of main.

Rename channel

Rename main to:

Delete channel

Delete main? This cannot be undone.

objc-at-keyword.m
// RUN: rm -rf %t
// RUN: %clang_cc1 -fmodules -fimplicit-module-maps -fmodules-cache-path=%t -verify -x objective-c -fmodule-name=objcAtKeywordMissingEnd -emit-module %S/Inputs/module.map
// RUN: %clang_cc1 -fmodules -fimplicit-module-maps -fmodules-cache-path=%t -x objective-c -fmodule-name=Empty -emit-module %S/Inputs/module.map
// RUN: %clang_cc1 -fmodules -fimplicit-module-maps -fmodules-cache-path=%t -verify -I %S/Inputs %s

@interface X // expected-note {{class started here}}
#pragma clang module import Empty // expected-error {{missing '@end'}}