I'm trying to work through the mpmc channel code in the Rust standard library. Much of it is covered by:
#[unstable(feature = "mpmc_channel", issue = "126840")]

and this gets in the way of the navigation features in vs code. For example, I can't reliably use "Go to definition" or find all references to a particular function.

Is there any way to configure the editor to include the unstable mpmc_channel feature?

I'm using the Rust and rust-analyzer extensions. (I tried the Rust Feature Toggler extension, but that doesn't help.)

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