syntax_data: {"ast_node_type":"other","tokens":[{"end":64,"kind":"keyword","start":0,"text":"I::BoundVarKinds:"}]}
source_snippet:                 I::BoundVarKinds: rustc_serialize::Decodable<D>,
context_before:                 $t: TypeVisitable<I> + rustc_serialize::Decodable<D>,
context_after:             {