syntax_data: {"ast_node_type":"other","tokens":[{"end":21,"kind":"keyword","start":0,"text":"///"}]}
source_snippet: /// must be non-None.
context_before: /// Where a crate came from on the local filesystem. One of these three options
context_after: #[derive(PartialEq, Clone, Debug, HashStable_Generic, Encodable, Decodable)]