unimplemented(_:placeholder:fileID:filePath:function:line:column:)

Unimplemented.swift:237
func unimplemented<Result>(_ description: @autoclosure @escaping () -> String = "", placeholder: @autoclosure @escaping () -> Result = (), fileID: StaticString = #fileID, filePath: StaticString = #filePath, function: StaticString = #function, line: UInt = #line, column: UInt = #column) -> Result