func (p *ConfigParser) Sections() []string {
	sections := make([]string, 0)
	for section := range p.config {
		sections = append(sections, section)
	}
	sort.Strings(sections)
	return sections
}
Sections returns a list of section names, excluding [DEFAULT].
package configparser
import (
	"fmt"
	"sort"
	"strconv"
)
func (p *ConfigParser) isDefaultSection(section string) bool {
	return section == defaultSectionName
}
func (p *ConfigParser) Defaults() Dict {
	return p.defaults.Items()
}