_ ___ _ __ ___ ___| |_ _ __ _ _ _ __ ___ / __| '_ \ / _ \/ __| __| '__| | | | '_ ` _ \ \__ \ |_) | __/ (__| |_| | | |_| | | | | | | |___/ .__/ \___|\___|\__|_| \__,_|_| |_| |_| |_| a set of lambdas