syntax_data: {"ast_node_type":"other","tokens":[{"end":79,"kind":"keyword","start":0,"text":"//"}]}
source_snippet: // any given target, and individual features can also be marked as `Forbidden`.
context_before: // `abi_required_features` function computes which target features must and must not be enabled for
context_after: // See https://github.com/rust-lang/rust/issues/116344 for some more context.