syntax_data: {"ast_node_type":"function","tokens":[{"end":66,"kind":"keyword","start":0,"text":"pub"}]}
source_snippet:     pub fn is_descendant_of(self, ancestor: LocalExpnId) -> bool {
context_before:     #[inline]
context_after:         self.to_expn_id().is_descendant_of(ancestor.to_expn_id())