syntax_data: {"ast_node_type":"other","tokens":[{"end":54,"kind":"keyword","start":0,"text":"///"}]}
source_snippet:     ///   useful in exotic environments/build systems.
context_before:     /// - still allows for discovery and automation, for example via feature detection. This can be
context_after:     #[derive(Clone, Copy, PartialEq, Eq, Default)]