docs: func (s *Predicate) Validate() error {
  	invalidParams := request.ErrInvalidParams{Context: "Predicate"}
  	if s.Conditions != nil {
  		for i, v := range s.Conditions {
  			if v == nil {
  				continue
  			}
  			if err := v.Validate(); err != nil {
  				invalidParams.AddNested(fmt.Sprintf("%s[%v]", "Conditions", i), err.(request.ErrInvalidParams))
  			}
  		}
  	}
  
  	if invalidParams.Len() > 0 {
  		return invalidParams
  	}
  	return nil
  }