warning: unused import: `super::models::*`
  --> src/apis/mod.rs:22:5
   |
22 | use super::models::*;
   |     ^^^^^^^^^^^^^^^^
   |
   = note: #[warn(unused_imports)] on by default
error[E0599]: no method named `to_string` found for type `std::vec::Vec<std::string::String>` in the current scope
   --> src/apis/pet_api.rs:115:71
    |
115 |             query.append_pair("status", &status.into_iter().map(|p| p.to_string()).collect::<Vec<String>>().join(",").to_string());
    |                                                                       ^^^^^^^^^
    |
    = note: the method `to_string` exists but the following trait bounds were not satisfied:
            `std::vec::Vec<std::string::String> : std::string::ToString`
            `[std::string::String] : std::string::ToString`
error[E0599]: no method named `to_string` found for type `std::vec::Vec<std::string::String>` in the current scope
   --> src/apis/pet_api.rs:147:67
    |
147 |             query.append_pair("tags", &tags.into_iter().map(|p| p.to_string()).collect::<Vec<String>>().join(",").to_string());
    |                                                                   ^^^^^^^^^
    |
    = note: the method `to_string` exists but the following trait bounds were not satisfied:
            `std::vec::Vec<std::string::String> : std::string::ToString`
            `[std::string::String] : std::string::ToString`
error[E0599]: no method named `to_string` found for type `models::File` in the current scope
   --> src/apis/pet_api.rs:286:28
    |
286 |             ("file", &file.to_string()),
    |                            ^^^^^^^^^
    | 
   ::: src/models/mod.rs:15:1
    |
15  | pub struct File;
    | ---------------- method `to_string` not found for this
    |
    = note: the method `to_string` exists but the following trait bounds were not satisfied:
            `models::File : std::string::ToString`
    = help: items from traits can only be used if the trait is implemented and in scope
    = note: the following trait defines an item `to_string`, perhaps you need to implement it:
            candidate #1: `std::string::ToString`
error: aborting due to 3 previous errors
For more information about this error, try `rustc --explain E0599`.
error: Could not compile `petstore_client`.