syntax_data: {"ast_node_type":"function","tokens":[{"end":52,"kind":"keyword","start":0,"text":"pub"}]}
source_snippet:     pub fn contains(self, other: Ty<'tcx>) -> bool {
context_before:     /// Example: `Option<()>` contains `()`
context_after:         struct ContainsTyVisitor<'tcx>(Ty<'tcx>);