syntax_data: {"ast_node_type":"other","tokens":[{"end":41,"kind":"keyword","start":0,"text":"opaque_and_semiopaque:"}]}
source_snippet:     opaque_and_semiopaque: SyntaxContext,
context_before:     /// This context, but with all transparent expansions filtered away.
context_after:     /// Name of the crate to which `$crate` with this context would resolve.