syntax_data: {"ast_node_type":"other","tokens":[{"end":68,"kind":"keyword","start":0,"text":"Some(ty::Instance::new_raw(trait_item_id,"}]}
source_snippet:                     Some(ty::Instance::new_raw(trait_item_id, args))
context_before:                     let args = tcx.erase_regions(rcvr_args);
context_after:                 }