code: public function buildNotCondition($operator, $operands, &$params)
      {
          array_unshift($operands, $operator);
          return $this->buildCondition($operands, $params);
      }
docs: Inverts an SQL expressions with `NOT` operator.
  @param string $operator the operator to use for connecting the given operands
  @param array $operands the SQL expressions to connect.
  @param array $params the binding parameters to be populated
  @return string the generated SQL expression
  @throws InvalidArgumentException if wrong number of operands have been given.
  @deprecated since 2.0.14. Use `buildCondition()` instead.