syntax_data: {"ast_node_type":"other","tokens":[{"end":88,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:                 // compare their length. But considering that the relevant `Relate` impl
context_before:                 // Ideally we would walk the existential predicates here or at least
context_after:                 // actually sorts and deduplicates these, that doesn't work.