If I get GN error like that:
ERROR at //moira/config/platform/r2/BUILD.gn:71:3 (//build/toolchain/old/host:host_clang): Undefined identifier.
configs += [
^------
and I try to Ctrl+Click to //moira/config/platform/r2/BUILD.gn:71:3
VS Code produce error:

I need to remove // at begging to make it work