syntax_data: {"ast_node_type":"other","tokens":[{"end":76,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:     // the inference variables inside with whatever we got from fulfillment.
context_before:     // Now resolve the *generic parameters* we built for the target earlier, replacing
context_after:     Ok(infcx.resolve_vars_if_possible(target_args))