code: func (t Any) Contains(other Type) bool {
  	if _, ok := other.(*Function); ok {
  		return false
  	}
  	for i := range t {
  		if Compare(t[i], other) == 0 {
  			return true
  		}
  	}
  	return len(t) == 0
  }
docs: // Contains returns true if t is a superset of other.