syntax_data: {"ast_node_type":"other","tokens":[{"end":60,"kind":"keyword","start":0,"text":"///"}]}
source_snippet:     /// [expand_free_alias_tys]: Self::expand_free_alias_tys
context_before:     /// [free]: ty::Free
context_after:     pub fn peel_off_free_alias_tys(self, mut ty: Ty<'tcx>) -> Ty<'tcx> {