[Rule Request] If all extension members are the same suggest extension modifier instead.

[masters3d]

If all declarations in an extension have the same ACL, the ACL should be in the extension itself.

extension Int {
    fileprivate func someFunc1(){}
    fileprivate func someFunc2(){}
    fileprivate func someFunc3(){}
}
//suggest
private extension Int { 
    func someFunc1(){} 
    func someFunc2(){} 
    func someFunc3(){}
}

Do not suggest when:

• all members of the extension are private [1]
• all members are the same but there is already an extension modifier
• all members are internal

[1] A private modifier on the extension effectively turns all members into fileprivate access.

reference:
#1543