syntax_data: {"ast_node_type":"other","tokens":[{"end":95,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:                     // the GAT. Since RPITITs also have all of the fn's generics, we slice only
context_before:                     // case, since it has been liberated), map it back to the early-bound lifetime of
context_after:                     // the end of the list corresponding to the opaque's generics.