func Uint64VarP(p *uint64, name, shorthand string, value uint64, usage string) {
	CommandLine.VarP(newUint64Value(value, p), name, shorthand, usage)
}
Uint64VarP is like Uint64Var, but accepts a shorthand letter that can be used after a single dash.
package pflag
import "strconv"
type uint64Value uint64
func newUint64Value(val uint64, p *uint64) *uint64Value {
	*p = val
	return (*uint64Value)(p)
}
func (i *uint64Value) Set(s string) error {
	v, err := strconv.ParseUint(s, 0, 64)
	*i = uint64Value(v)
	return err
}
func (i *uint64Value) Type() string {
	return "uint64"
}
func (i *uint64Value) String() string { return strconv.FormatUint(uint64(*i), 10) }
func uint64Conv(sval string) (interface{}, error) {
	v, err := strconv.ParseUint(sval, 0, 64)
	if err != nil {
		return 0, err
	}
	return uint64(v), nil
}
func (f *FlagSet) GetUint64(name string) (uint64, error) {
	val, err := f.getFlagType(name, "uint64", uint64Conv)
	if err != nil {
		return 0, err
	}
	return val.(uint64), nil
}
func (f *FlagSet) Uint64Var(p *uint64, name string, value uint64, usage string) {
	f.VarP(newUint64Value(value, p), name, "", usage)
}
func (f *FlagSet) Uint64VarP(p *uint64, name, shorthand string, value uint64, usage string) {
	f.VarP(newUint64Value(value, p), name, shorthand, usage)
}
func Uint64Var(p *uint64, name string, value uint64, usage string) {
	CommandLine.VarP(newUint64Value(value, p), name, "", usage)
}