func (v Value) Keys() []string {
	x, ok := v.data.(dict)
	if !ok {
		strm, ok := v.data.(stream)
		if !ok {
			return nil
		}
		x = strm.hdr
	}
	keys := []string{} // not nil
	for k := range x {
		keys = append(keys, string(k))
	}
	sort.Strings(keys)
	return keys
}
func (v Value) Keys() []string {
	x, ok := v.data.(dict)
	if !ok {
		strm, ok := v.data.(stream)
		if !ok {
			return nil
		}
		x = strm.hdr
	}
	keys := []string{} 
	for k := range x {
		keys = append(keys, string(k))
	}
	sort.Strings(keys)
	return keys
}
func ( v Value ) Keys ( ) [ ] string { x , ok := v . data . ( dict ) if ! ok { strm , ok := v . data . ( stream ) if ! ok { return nil } x = strm . hdr } keys := [ ] string { } // not nil for k := range x { keys = append ( keys , string ( k ) ) } sort . Strings ( keys ) return keys }
// Keys returns a sorted list of the keys in the dictionary v.
// If v is a stream, Keys applies to the stream's header dictionary.
// If v.Kind() != Dict and v.Kind() != Stream, Keys returns nil.
Keys returns a sorted list of the keys in the dictionary v . If v is a stream Keys applies to the stream s header dictionary . If v . Kind () ! = Dict and v . Kind () ! = Stream Keys returns nil .