syntax_data: {"ast_node_type":"other","tokens":[{"end":85,"kind":"keyword","start":0,"text":"//`Aggregate`"}]}
source_snippet:                 //`Aggregate` entirely here, but some targets need to be fixed first.
context_before:                 // `layout.backend_repr` and ignore everything else. We should just reject
context_after:                 match arg.layout.backend_repr {