syntax_data: {"ast_node_type":"variable","tokens":[{"end":66,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:         let (opaque, opaque_and_semiopaque) = match transparency {
context_before:         // Evaluate opaque and semi-opaque versions of the new syntax context.
context_after:             Transparency::Transparent => (parent_opaque, parent_opaque_and_semiopaque),