syntax_data: {"ast_node_type":"other","tokens":[{"end":91,"kind":"keyword","start":0,"text":"matches!(self.ctxt().outer_expn_data().kind,"}]}
source_snippet:         matches!(self.ctxt().outer_expn_data().kind, ExpnKind::Macro(MacroKind::Derive, _))
context_before:     pub fn in_derive_expansion(self) -> bool {
context_after:     }