func isBuiltInType(name string) bool {
	for _, n := range BuiltInTypes {
		if name == n {
			return true
		}
	}
	return false
}
func isBuiltInType(name string) bool {
	for _, n := range BuiltInTypes {
		if name == n {
			return true
		}
	}
	return false
}
// Returns true if given name is the name of a built-in type