func Require(m Model, flags ...string) {
	// check all flags
	for _, f := range flags {
		L(m, f, true)
	}
}
func Require(m Model, flags ...string) {
	
	for _, f := range flags {
		L(m, f, true)
	}
}
func Require ( m Model , flags ... string ) { // check all flags for _ , f := range flags { L ( m , f , true ) } }
// Require will check if the specified flags are set on the specified model and
// panic if one is missing.
Require will check if the specified flags are set on the specified model and panic if one is missing .