syntax_data: {"ast_node_type":"other","tokens":[{"end":6,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:     //
context_before:     // tests/ui/unstable-feature-bound/unstable_impl_method_selection.rs is one of the example.
context_after:     // Note: `feature_bound_holds_in_crate` does not consider a feature to be enabled