syntax_data: {"ast_node_type":"other","tokens":[{"end":59,"kind":"keyword","start":0,"text":"///"}]}
source_snippet: /// 3. `Seq`s and `Alt`s with a single member do not exist.
context_before: /// 2. A `Seq` is never directly nested beneath another `Seq`.
context_after: #[derive(Clone, Debug, Hash, PartialEq, Eq)]