syntax_data: {"ast_node_type":"other","tokens":[{"end":82,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:         // global cache as we don't cache overflow in the global cache but need to
context_before:         // Subtle: we need to check the local cache even if we're able to use the
context_after:         // cache it as otherwise rustdoc hangs when compiling diesel.