func (not Not) WriteTo(w Writer) error {
	if _, err := fmt.Fprint(w, "NOT "); err != nil {
		return err
	}
	switch not[0].(type) {
	case condAnd, condOr:
		if _, err := fmt.Fprint(w, "("); err != nil {
			return err
		}
	}
	if err := not[0].WriteTo(w); err != nil {
		return err
	}
	switch not[0].(type) {
	case condAnd, condOr:
		if _, err := fmt.Fprint(w, ")"); err != nil {
			return err
		}
	}
	return nil
}
WriteTo writes SQL to Writer
package builder
import "fmt"
type Not [1]Cond
var _ Cond = Not{}