Modify CPR library to be able to access member variables for some types.

module/Vendor/CPR/include/cpr/cookies.h

@@ -46,7 +46,7 @@ class Cookies {
     const_iterator cbegin() const;
     const_iterator cend() const;
 
-  private:
+  protected:
     std::map<std::string, std::string> map_;
 };
 

module/Vendor/CPR/include/cpr/parameters.h

@@ -8,6 +8,8 @@
 namespace cpr {
 
 class Parameters : public CurlContainer<Parameter> {
+  protected:
+    using CurlContainer<Parameter>::containerList_;
   public:
     Parameters() = default;
     Parameters(const std::initializer_list<Parameter>& parameters);

module/Vendor/CPR/include/cpr/payload.h

@@ -8,6 +8,8 @@
 
 namespace cpr {
 class Payload : public CurlContainer<Pair> {
+  protected:
+    using CurlContainer<Pair>::containerList_;
   public:
     template <class It>
     Payload(const It begin, const It end) {

module/Vendor/CPR/include/cpr/proxies.h

@@ -14,7 +14,7 @@ class Proxies {
     bool has(const std::string& protocol) const;
     const std::string& operator[](const std::string& protocol);
 
-  private:
+  protected:
     std::map<std::string, std::string> hosts_;
 };
 } // namespace cpr

module/Vendor/CPR/include/cpr/response.h

@@ -18,7 +18,7 @@
 namespace cpr {
 
 class Response {
-  private:
+  protected:
     std::shared_ptr<CurlHolder> curl_{nullptr};
 
   public: