func (sb *Builder) Bytes() []byte {
	return sb.data[0:sb.length]
}
Bytes returns the accumulated bytes.
package stringutils
import (
	"unicode/utf8"
)
type Builder struct {
	data   []byte
	length int
}
const scaleFactor = 2
func (sb *Builder) Len() int {
	return sb.length
}
func (sb *Builder) Cap() int {
	return len(sb.data)
}