syntax_data: {"ast_node_type":"other","tokens":[{"end":78,"kind":"keyword","start":0,"text":"interner.debug_assert_existential_args_compatible(trait_def_id,"}]}
source_snippet:         interner.debug_assert_existential_args_compatible(trait_def_id, args);
context_before:     pub fn new_from_args(interner: I, trait_def_id: I::DefId, args: I::GenericArgs) -> Self {
context_after:         Self { def_id: trait_def_id, args, _use_existential_trait_ref_new_instead: () }