syntax_data: {"ast_node_type":"other","tokens":[{"end":82,"kind":"keyword","start":0,"text":"(CheckRegions::OnlyParam"}]}
source_snippet:                     (CheckRegions::OnlyParam | CheckRegions::FromFunction, _) => {
context_before:                     }
context_after:                         return Err(NotUniqueParam::NotParam(lt.into()));