@@ -36,6 +36,7 @@ func NewArgs(initialArgs ...KeyValuePair) Args {

 	return args

 }

+// Keys returns all the keys in list of Args

 func (args Args) Keys() []string {

 	keys := make([]string, 0, len(args.fields))

 	for k := range args.fields {

@@ -16,8 +16,10 @@ type BuilderGCRule struct {

 	KeepStorage string          `json:",omitempty"`

 }

+// BuilderGCFilter contains garbage-collection filter rules for a BuildKit builder

 type BuilderGCFilter filters.Args

+// MarshalJSON returns a JSON byte representation of the BuilderGCFilter

 func (x *BuilderGCFilter) MarshalJSON() ([]byte, error) {

 	f := filters.Args(*x)

 	keys := f.Keys()

@@ -32,6 +34,7 @@ func (x *BuilderGCFilter) MarshalJSON() ([]byte, error) {

 	return json.Marshal(arr)

 }

+// UnmarshalJSON fills the BuilderGCFilter values structure from JSON input

 func (x *BuilderGCFilter) UnmarshalJSON(data []byte) error {

 	var arr []string

 	f := filters.NewArgs()