func NewAmountFlag(defaultValue bchutil.Amount) *AmountFlag {
	return &AmountFlag{defaultValue}
}
NewAmountFlag creates an AmountFlag with a default bchutil.Amount.
package cfgutil
import (
	"strconv"
	"strings"
	"github.com/gcash/bchutil"
)
type AmountFlag struct {
	bchutil.Amount
}