syntax_data: {"ast_node_type":"other","tokens":[{"end":76,"kind":"keyword","start":0,"text":"\"resolving"}]}
source_snippet:                 "resolving ImplSource::UserDefined: {:?}, {:?}, {:?}, {:?}",
context_before:             debug!(
context_after:                 typing_env, trait_item_id, rcvr_args, impl_data