typed.go
func (t Typed) InterfaceMust(key string) interface{} {
	i, exists := t.InterfaceIf(key)
	if exists == false {
		panic("expected map for " + key)
	}
	return i
}
func (t Typed) InterfaceMust(key string) interface{} {
	i, exists := t.InterfaceIf(key)
	if exists == false {
		panic("expected map for " + key)
	}
	return i
}
func ( t Typed ) InterfaceMust ( key string ) interface { } { i , exists := t . InterfaceIf ( key ) if exists == false { panic ( " " + key ) } return i }
// Returns an interface or panics
Returns an interface or panics