Add code comments

Signed-off-by: 蓝宝石的傻话 <mickey_zzc@163.com>

pkg/options/types.go

@@ -108,6 +108,7 @@ func (r *ResourceSet) Type() string {
 // NodeType represents a nodeName to query from.
 type NodeType map[string]struct{}
 
+// Set converts a comma-separated string of nodename into a slice and appends it to the NodeList
 func (n *NodeType) Set(value string) error {
 	s := *n
 	cols := strings.Split(value, ",")
@@ -120,6 +121,7 @@ func (n *NodeType) Set(value string) error {
 	return nil
 }
 
+// AsSlice returns the LabelsAllowList in the form of plain string slice.
 func (n NodeType) AsSlice() []string {
 	cols := make([]string, 0, len(n))
 	for col := range n {
@@ -132,6 +134,7 @@ func (n NodeType) String() string {
 	return strings.Join(n.AsSlice(), ",")
 }
 
+// Type returns a descriptive string about the NodeList type.
 func (n *NodeType) Type() string {
 	return "string"
 }
@@ -150,6 +153,7 @@ func (n *NodeType) GetNodeFieldSelector() string {
 
 }
 
+// NodeValue represents a nodeName to query from.
 type NodeValue interface {
 	GetNodeFieldSelector() string
 }