_                        
     ___ _ __   ___  ___| |_ _ __ _   _ _ __ ___  
    / __| '_ \ / _ \/ __| __| '__| | | | '_ ` _ \ 
    \__ \ |_) |  __/ (__| |_| |  | |_| | | | | | |
    |___/ .__/ \___|\___|\__|_|   \__,_|_| |_| |_|
        |_|                                       

                                    a set of lambdas