100% Optional Delegate Functions in Swift

OptionalDelegate.swift

protocol SomeDelegate: class
{
    func function()
    func optionalFunction()
}

extension SomeDelegate
{
    func optionalFunction() { print("This will get called if the function isn't implemented") }
}

class SomeClass
{
    weak var delegate: SomeDelegate?
    
    func fireDelegates()
    {
        self.delegate?.function()
        self.delegate?.optionalFunction()
    }
}

class DelegateClass: SomeDelegate
{
    init()
    {
        let some: SomeClass = SomeClass()
        some.delegate = self
        some.fireDelegates()
    }
    
    func function()
    {
        print("the required delegate function")
    }
    
    func optionalFunction()
    {
        print("the optional delegate function")
    }
}

let delegateClass = DelegateClass()