267     let mut serialized_fields = fields  in serialize_tuple_struct()  localVariable
273     let let_mut = mut_if(serialized_fields.peek().is_some());  in serialize_tuple_struct()
275     let len = serialized_fields  in serialize_tuple_struct()
332     let mut serialized_fields = fields  in serialize_struct_as_struct()  localVariable
337     let let_mut = mut_if(serialized_fields.peek().is_some() || tag_field_exists);  in serialize_struct_as_struct()
339     let len = serialized_fields  in serialize_struct_as_struct()
371     let mut serialized_fields = fields  in serialize_struct_as_map()  localVariable
376     let let_mut = mut_if(serialized_fields.peek().is_some() || tag_field_exists);  in serialize_struct_as_map()
381         let len = serialized_fields  in serialize_struct_as_map()
810     let mut serialized_fields = fields  in serialize_tuple_variant()  localVariable
816     let let_mut = mut_if(serialized_fields.peek().is_some());  in serialize_tuple_variant()
818     let len = serialized_fields  in serialize_tuple_variant()
888     let mut serialized_fields = fields  in serialize_struct_variant()  localVariable
893     let let_mut = mut_if(serialized_fields.peek().is_some());  in serialize_struct_variant()
895     let len = serialized_fields  in serialize_struct_variant()
962     let mut serialized_fields = fields  in serialize_struct_variant_with_flatten()  localVariable
967     let let_mut = mut_if(serialized_fields.peek().is_some());  in serialize_struct_variant_with_flatten()