syntax_data: {"ast_node_type":"other","tokens":[{"end":73,"kind":"keyword","start":0,"text":"///"}]}
source_snippet:     /// declared, but a type name in a non-zero universe is a placeholder
context_before:     /// universe 0 always corresponds to some "ground" type that the user
context_after:     /// type -- an idealized representative of "types in general" that we