Fork channel

Create a new channel as a copy of main.

Rename channel

Rename main to:

Delete channel

Delete main? This cannot be undone.

stubbed-dylib.test
RUN: llvm-objdump --macho -d %p/Inputs/stubbed.dylib.macho-x86_64 | FileCheck %s

CHECK: (__TEXT,__text) section
CHECK-NOT: func
CHECK-NOT: func2