update capabilities of static analysis parser

Change-Id: Ie09399981fcef213e0e7c7d12a8039aedbf0246a

staging/src/k8s.io/component-base/metrics/collector.go

@@ -45,9 +45,9 @@ type StableCollector interface {
 	HiddenMetrics() []string
 }
 
-// BaseStableCollector which implements almost all of the methods defined by StableCollector
+// BaseStableCollector which implements almost all methods defined by StableCollector
 // is a convenient assistant for custom collectors.
-// It is recommend that inherit BaseStableCollector when implementing custom collectors.
+// It is recommended to inherit BaseStableCollector when implementing custom collectors.
 type BaseStableCollector struct {
 	descriptors  map[string]*Desc // stores all descriptors by pair<fqName, Desc>, these are collected from DescribeWithStability().
 	registerable map[string]*Desc // stores registerable descriptors by pair<fqName, Desc>, is a subset of descriptors.
@@ -62,7 +62,7 @@ func (bsc *BaseStableCollector) DescribeWithStability(ch chan<- *Desc) {
 }
 
 // Describe sends all descriptors to the provided channel.
-// It intend to be called by prometheus registry.
+// It intended to be called by prometheus registry.
 func (bsc *BaseStableCollector) Describe(ch chan<- *prometheus.Desc) {
 	for _, d := range bsc.registerable {
 		ch <- d.toPrometheusDesc()

staging/src/k8s.io/component-base/metrics/opts.go

@@ -66,9 +66,15 @@ func BuildFQName(namespace, subsystem, name string) string {
 type StabilityLevel string
 
 const (
+	// INTERNAL metrics have no stability guarantees, as such, labels may
+	// be arbitrarily added/removed and the metric may be deleted at any time.
+	INTERNAL StabilityLevel = "INTERNAL"
 	// ALPHA metrics have no stability guarantees, as such, labels may
 	// be arbitrarily added/removed and the metric may be deleted at any time.
 	ALPHA StabilityLevel = "ALPHA"
+	// BETA metrics are governed by the deprecation policy outlined in by
+	// the control plane metrics stability KEP.
+	BETA StabilityLevel = "BETA"
 	// STABLE metrics are guaranteed not be mutated and removal is governed by
 	// the deprecation policy outlined in by the control plane metrics stability KEP.
 	STABLE StabilityLevel = "STABLE"

staging/src/k8s.io/component-base/metrics/opts_test.go

@@ -38,9 +38,9 @@ func TestDefaultStabilityLevel(t *testing.T) {
 			expectPanic: false,
 		},
 		{
-			name:        "ALPHA remain unchanged",
-			inputValue:  ALPHA,
-			expectValue: ALPHA,
+			name:        "INTERNAL remain unchanged",
+			inputValue:  INTERNAL,
+			expectValue: INTERNAL,
 			expectPanic: false,
 		},
 		{