/// API url and key context.
pubenumApi<'a> {/// API context for Listen Notes production API.
Production(&'astr),/// API context for Listen Notes mock API for testing.
Mock,}implApi<'_>{pubfnurl(&self)->&str{match&self{Api::Production(_)=>"https://listen-api.listennotes.com/api/v2",Api::Mock =>"https://listen-api-test.listennotes.com/api/v2",}}}