syntax_data: {"ast_node_type":"other","tokens":[{"end":65,"kind":"keyword","start":0,"text":"self.to_expn_id().is_descendant_of(ancestor.to_expn_id())"}]}
source_snippet:         self.to_expn_id().is_descendant_of(ancestor.to_expn_id())
context_before:     pub fn is_descendant_of(self, ancestor: LocalExpnId) -> bool {
context_after:     }