mojo/public/tools/bindings/generators/cpp_templates/interface_proxy_declaration.tmpl

{%- import "interface_macros.tmpl" as interface_macros %}
class {{interface.name}}Proxy : public {{interface.name}} {
 public:
  explicit {{interface.name}}Proxy(mojo::MessageReceiverWithResponder* receiver);

{%- for method in interface.methods %}
  virtual void {{method.name}}(
      {{interface_macros.declare_request_params("", method)}}
  ) override;
{%- endfor %}

 private:
  mojo::MessageReceiverWithResponder* receiver_;
};