420 

   421 /// Works basically the same as `py_shared_mapping_iterator`, but with only a

   422 /// key.

   423 macro_rules! py_shared_sequence_iterator {

   424     (

   425         $name:ident,

   426         $leaked:ident,

   427         $key_type: ty,

   428         $success_func: path,

   429         $success_type: ty

   430     ) => {

   431         py_shared_iterator_impl!(

   432             $name,

   433             $leaked,

   434             Box<dyn Iterator<Item = &'static $key_type> + Send>,

   435             $success_func,

   436             $success_type

   437         );

   438     };

   439 }