syntax_data: {"ast_node_type":"enum","tokens":[{"end":19,"kind":"keyword","start":0,"text":"pub"}]}
source_snippet: pub enum ExpnKind {
context_before: #[derive(Clone, Debug, PartialEq, Encodable, Decodable, HashStable_Generic)]
context_after:     /// No expansion, aka root expansion. Only `ExpnId::root()` has this kind.