syntax_data: {"ast_node_type":"function","tokens":[{"end":49,"kind":"keyword","start":0,"text":"pub"}]}
source_snippet:     pub fn is_opaque(self, interner: I) -> bool {
context_before:     /// Whether this alias type is an opaque.
context_after:         matches!(self.kind(interner), AliasTyKind::Opaque)