syntax_data: {"ast_node_type":"other","tokens":[{"end":100,"kind":"keyword","start":0,"text":"//"}]}
source_snippet: // a `tcx.make_ty(def, identity_args)` and as such it is legal to instantiate the generic parameters
context_before: // If `def_id` refers to a generic ADT, the queries above and below act as if they had been handed
context_after: // of the ADT into the outputted `ty`s.