@Override public ValidationResult validateDeletion(Library object) { ValidationResult result = new ValidationResult(); if (object.getLibraryDilutions() != null && !object.getLibraryDilutions().isEmpty()) { result.addError(new ValidationError(object.getName() + " has " + object.getLibraryDilutions().size() + " dilution" + (object.getLibraryDilutions().size() > 1 ? "s" : ""))); } return result; }