syntax_data: {"ast_node_type":"other","tokens":[{"end":72,"kind":"keyword","start":0,"text":"self.principal().map(|trait_ref|"}]}
source_snippet:         self.principal().map(|trait_ref| trait_ref.skip_binder().def_id)
context_before:     pub fn principal_def_id(&self) -> Option<DefId> {
context_after:     }