Use of undeclared type 'SideMenuNavigationControllerDelegate'

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I have read the guidelines for contributing and I understand

• My issue is happening in the latest version of SideMenu (older versions are no longer maintained).
• My issue was not solved in the README.
• My issue can not be answered on stackoverflow.com.
• My issue is not a request for new functionality that I am unwilling to build and contribute with a pull request.
• My issue is reproducible in the demo project.

Describe the bug
SideMenu is working fine but
I am trying to change the background view colour when sidemenu open and when side menu close i want its original backgroung view colour for that i am using SideMenuNavigationControllerDelegate
methods
func sideMenuDidDisappear(menu: SideMenuNavigationController, animated: Bool) {
print("SideMenu Disappeared! (animated: (animated))")
}
in above method i am getting below errors, i have imported sidemenu in my project as well

Use of undeclared type 'SideMenuNavigationControllerDelegate'
Use of undeclared type 'SideMenuNavigationController'

.