syntax_data: {"ast_node_type":"other","tokens":[{"end":99,"kind":"keyword","start":0,"text":"//"}]}
source_snippet: // `abi_required_features` function computes which target features must and must not be enabled for
context_before: // arguments, so letting people toggle that feature would be unsound. To this end, the
context_after: // any given target, and individual features can also be marked as `Forbidden`.