Update k8s.io/gengo to 955ffa8fcfc983717cd9de5d2a1e9f5c465f4376

go.mod

@@ -153,7 +153,7 @@ require (
 	k8s.io/component-base v0.0.0
 	k8s.io/cri-api v0.0.0
 	k8s.io/csi-translation-lib v0.0.0
-	k8s.io/gengo v0.0.0-20190128074634-0689ccc1d7d6
+	k8s.io/gengo v0.0.0-20190813173942-955ffa8fcfc9
 	k8s.io/heapster v1.2.0-beta.1
 	k8s.io/klog v0.4.0
 	k8s.io/kube-aggregator v0.0.0
@@ -441,7 +441,7 @@ replace (
 	k8s.io/component-base => ./staging/src/k8s.io/component-base
 	k8s.io/cri-api => ./staging/src/k8s.io/cri-api
 	k8s.io/csi-translation-lib => ./staging/src/k8s.io/csi-translation-lib
-	k8s.io/gengo => k8s.io/gengo v0.0.0-20190128074634-0689ccc1d7d6
+	k8s.io/gengo => k8s.io/gengo v0.0.0-20190813173942-955ffa8fcfc9
 	k8s.io/heapster => k8s.io/heapster v1.2.0-beta.1
 	k8s.io/klog => k8s.io/klog v0.4.0
 	k8s.io/kube-aggregator => ./staging/src/k8s.io/kube-aggregator

go.sum

@@ -474,8 +474,8 @@ gotest.tools v2.2.0+incompatible h1:VsBPFP1AI068pPrMxtb/S8Zkgf9xEmTLJjfM+P5UIEo=
 gotest.tools v2.2.0+incompatible/go.mod h1:DsYFclhRJ6vuDpmuTbkuFWG+y2sxOXAzmJt81HFBacw=
 gotest.tools/gotestsum v0.3.5 h1:VePOWRsuWFYpfp/G8mbmOZKxO5T3501SEGQRUdvq7h0=
 gotest.tools/gotestsum v0.3.5/go.mod h1:Mnf3e5FUzXbkCfynWBGOwLssY7gTQgCHObK9tMpAriY=
-k8s.io/gengo v0.0.0-20190128074634-0689ccc1d7d6 h1:4s3/R4+OYYYUKptXPhZKjQ04WJ6EhQQVFdjOFvCazDk=
+k8s.io/gengo v0.0.0-20190813173942-955ffa8fcfc9 h1:/gJp8cw8+k4AxBNGZ5u5eRoCOzH3WVpY02K654HNiyU=
-k8s.io/gengo v0.0.0-20190128074634-0689ccc1d7d6/go.mod h1:ezvh/TsK7cY6rbqRK0oQQ8IAqLxYwwyPxAX1Pzy0ii0=
+k8s.io/gengo v0.0.0-20190813173942-955ffa8fcfc9/go.mod h1:ezvh/TsK7cY6rbqRK0oQQ8IAqLxYwwyPxAX1Pzy0ii0=
 k8s.io/heapster v1.2.0-beta.1 h1:lUsE/AHOMHpi3MLlBEkaU8Esxm5QhdyCrv1o7ot0s84=
 k8s.io/heapster v1.2.0-beta.1/go.mod h1:h1uhptVXMwC8xtZBYsPXKVi8fpdlYkTs6k949KozGrM=
 k8s.io/klog v0.4.0 h1:lCJCxf/LIowc2IGS9TPjWDyXY4nOmdGdfcwwDQCOURQ=

staging/src/k8s.io/apiextensions-apiserver/go.sum

@@ -303,6 +303,8 @@ gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gotest.tools v2.2.0+incompatible/go.mod h1:DsYFclhRJ6vuDpmuTbkuFWG+y2sxOXAzmJt81HFBacw=
 k8s.io/gengo v0.0.0-20190128074634-0689ccc1d7d6 h1:4s3/R4+OYYYUKptXPhZKjQ04WJ6EhQQVFdjOFvCazDk=
 k8s.io/gengo v0.0.0-20190128074634-0689ccc1d7d6/go.mod h1:ezvh/TsK7cY6rbqRK0oQQ8IAqLxYwwyPxAX1Pzy0ii0=
+k8s.io/gengo v0.0.0-20190813173942-955ffa8fcfc9 h1:/gJp8cw8+k4AxBNGZ5u5eRoCOzH3WVpY02K654HNiyU=
+k8s.io/gengo v0.0.0-20190813173942-955ffa8fcfc9/go.mod h1:ezvh/TsK7cY6rbqRK0oQQ8IAqLxYwwyPxAX1Pzy0ii0=
 k8s.io/klog v0.0.0-20181102134211-b9b56d5dfc92/go.mod h1:Gq+BEi5rUBO/HRz0bTSXDUcqjScdoY3a9IHpCEIOOfk=
 k8s.io/klog v0.3.0/go.mod h1:Gq+BEi5rUBO/HRz0bTSXDUcqjScdoY3a9IHpCEIOOfk=
 k8s.io/klog v0.4.0 h1:lCJCxf/LIowc2IGS9TPjWDyXY4nOmdGdfcwwDQCOURQ=

staging/src/k8s.io/code-generator/go.mod

@@ -13,7 +13,7 @@ require (
 	github.com/spf13/pflag v1.0.3
 	gonum.org/v1/gonum v0.0.0-20190331200053-3d26580ed485
 	gonum.org/v1/netlib v0.0.0-20190331212654-76723241ea4e // indirect
-	k8s.io/gengo v0.0.0-20190128074634-0689ccc1d7d6
+	k8s.io/gengo v0.0.0-20190813173942-955ffa8fcfc9
 	k8s.io/klog v0.4.0
 	k8s.io/kube-openapi v0.0.0-20190709113604-33be087ad058
 )

staging/src/k8s.io/code-generator/go.sum

@@ -95,6 +95,8 @@ gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 k8s.io/gengo v0.0.0-20190128074634-0689ccc1d7d6 h1:4s3/R4+OYYYUKptXPhZKjQ04WJ6EhQQVFdjOFvCazDk=
 k8s.io/gengo v0.0.0-20190128074634-0689ccc1d7d6/go.mod h1:ezvh/TsK7cY6rbqRK0oQQ8IAqLxYwwyPxAX1Pzy0ii0=
+k8s.io/gengo v0.0.0-20190813173942-955ffa8fcfc9 h1:/gJp8cw8+k4AxBNGZ5u5eRoCOzH3WVpY02K654HNiyU=
+k8s.io/gengo v0.0.0-20190813173942-955ffa8fcfc9/go.mod h1:ezvh/TsK7cY6rbqRK0oQQ8IAqLxYwwyPxAX1Pzy0ii0=
 k8s.io/klog v0.0.0-20181102134211-b9b56d5dfc92/go.mod h1:Gq+BEi5rUBO/HRz0bTSXDUcqjScdoY3a9IHpCEIOOfk=
 k8s.io/klog v0.4.0 h1:lCJCxf/LIowc2IGS9TPjWDyXY4nOmdGdfcwwDQCOURQ=
 k8s.io/klog v0.4.0/go.mod h1:4Bi6QPql/J/LkTDqv7R/cd3hPo4k2DG6Ptcz060Ez5I=

staging/src/k8s.io/kube-aggregator/go.sum

@@ -259,6 +259,8 @@ gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gotest.tools v2.2.0+incompatible/go.mod h1:DsYFclhRJ6vuDpmuTbkuFWG+y2sxOXAzmJt81HFBacw=
 k8s.io/gengo v0.0.0-20190128074634-0689ccc1d7d6 h1:4s3/R4+OYYYUKptXPhZKjQ04WJ6EhQQVFdjOFvCazDk=
 k8s.io/gengo v0.0.0-20190128074634-0689ccc1d7d6/go.mod h1:ezvh/TsK7cY6rbqRK0oQQ8IAqLxYwwyPxAX1Pzy0ii0=
+k8s.io/gengo v0.0.0-20190813173942-955ffa8fcfc9 h1:/gJp8cw8+k4AxBNGZ5u5eRoCOzH3WVpY02K654HNiyU=
+k8s.io/gengo v0.0.0-20190813173942-955ffa8fcfc9/go.mod h1:ezvh/TsK7cY6rbqRK0oQQ8IAqLxYwwyPxAX1Pzy0ii0=
 k8s.io/klog v0.0.0-20181102134211-b9b56d5dfc92/go.mod h1:Gq+BEi5rUBO/HRz0bTSXDUcqjScdoY3a9IHpCEIOOfk=
 k8s.io/klog v0.3.0/go.mod h1:Gq+BEi5rUBO/HRz0bTSXDUcqjScdoY3a9IHpCEIOOfk=
 k8s.io/klog v0.4.0 h1:lCJCxf/LIowc2IGS9TPjWDyXY4nOmdGdfcwwDQCOURQ=

staging/src/k8s.io/kubectl/go.sum

@@ -224,6 +224,7 @@ gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gotest.tools v2.2.0+incompatible h1:VsBPFP1AI068pPrMxtb/S8Zkgf9xEmTLJjfM+P5UIEo=
 gotest.tools v2.2.0+incompatible/go.mod h1:DsYFclhRJ6vuDpmuTbkuFWG+y2sxOXAzmJt81HFBacw=
 k8s.io/gengo v0.0.0-20190128074634-0689ccc1d7d6/go.mod h1:ezvh/TsK7cY6rbqRK0oQQ8IAqLxYwwyPxAX1Pzy0ii0=
+k8s.io/gengo v0.0.0-20190813173942-955ffa8fcfc9/go.mod h1:ezvh/TsK7cY6rbqRK0oQQ8IAqLxYwwyPxAX1Pzy0ii0=
 k8s.io/klog v0.0.0-20181102134211-b9b56d5dfc92/go.mod h1:Gq+BEi5rUBO/HRz0bTSXDUcqjScdoY3a9IHpCEIOOfk=
 k8s.io/klog v0.3.0/go.mod h1:Gq+BEi5rUBO/HRz0bTSXDUcqjScdoY3a9IHpCEIOOfk=
 k8s.io/klog v0.4.0 h1:lCJCxf/LIowc2IGS9TPjWDyXY4nOmdGdfcwwDQCOURQ=

staging/src/k8s.io/metrics/go.sum

@@ -140,6 +140,8 @@ gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 k8s.io/gengo v0.0.0-20190128074634-0689ccc1d7d6 h1:4s3/R4+OYYYUKptXPhZKjQ04WJ6EhQQVFdjOFvCazDk=
 k8s.io/gengo v0.0.0-20190128074634-0689ccc1d7d6/go.mod h1:ezvh/TsK7cY6rbqRK0oQQ8IAqLxYwwyPxAX1Pzy0ii0=
+k8s.io/gengo v0.0.0-20190813173942-955ffa8fcfc9 h1:/gJp8cw8+k4AxBNGZ5u5eRoCOzH3WVpY02K654HNiyU=
+k8s.io/gengo v0.0.0-20190813173942-955ffa8fcfc9/go.mod h1:ezvh/TsK7cY6rbqRK0oQQ8IAqLxYwwyPxAX1Pzy0ii0=
 k8s.io/klog v0.0.0-20181102134211-b9b56d5dfc92/go.mod h1:Gq+BEi5rUBO/HRz0bTSXDUcqjScdoY3a9IHpCEIOOfk=
 k8s.io/klog v0.3.0/go.mod h1:Gq+BEi5rUBO/HRz0bTSXDUcqjScdoY3a9IHpCEIOOfk=
 k8s.io/klog v0.4.0 h1:lCJCxf/LIowc2IGS9TPjWDyXY4nOmdGdfcwwDQCOURQ=

staging/src/k8s.io/node-api/go.sum

@@ -142,6 +142,8 @@ gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 k8s.io/gengo v0.0.0-20190128074634-0689ccc1d7d6 h1:4s3/R4+OYYYUKptXPhZKjQ04WJ6EhQQVFdjOFvCazDk=
 k8s.io/gengo v0.0.0-20190128074634-0689ccc1d7d6/go.mod h1:ezvh/TsK7cY6rbqRK0oQQ8IAqLxYwwyPxAX1Pzy0ii0=
+k8s.io/gengo v0.0.0-20190813173942-955ffa8fcfc9 h1:/gJp8cw8+k4AxBNGZ5u5eRoCOzH3WVpY02K654HNiyU=
+k8s.io/gengo v0.0.0-20190813173942-955ffa8fcfc9/go.mod h1:ezvh/TsK7cY6rbqRK0oQQ8IAqLxYwwyPxAX1Pzy0ii0=
 k8s.io/klog v0.0.0-20181102134211-b9b56d5dfc92/go.mod h1:Gq+BEi5rUBO/HRz0bTSXDUcqjScdoY3a9IHpCEIOOfk=
 k8s.io/klog v0.3.0/go.mod h1:Gq+BEi5rUBO/HRz0bTSXDUcqjScdoY3a9IHpCEIOOfk=
 k8s.io/klog v0.4.0 h1:lCJCxf/LIowc2IGS9TPjWDyXY4nOmdGdfcwwDQCOURQ=

staging/src/k8s.io/sample-apiserver/go.sum

@@ -256,6 +256,8 @@ gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gotest.tools v2.2.0+incompatible/go.mod h1:DsYFclhRJ6vuDpmuTbkuFWG+y2sxOXAzmJt81HFBacw=
 k8s.io/gengo v0.0.0-20190128074634-0689ccc1d7d6 h1:4s3/R4+OYYYUKptXPhZKjQ04WJ6EhQQVFdjOFvCazDk=
 k8s.io/gengo v0.0.0-20190128074634-0689ccc1d7d6/go.mod h1:ezvh/TsK7cY6rbqRK0oQQ8IAqLxYwwyPxAX1Pzy0ii0=
+k8s.io/gengo v0.0.0-20190813173942-955ffa8fcfc9 h1:/gJp8cw8+k4AxBNGZ5u5eRoCOzH3WVpY02K654HNiyU=
+k8s.io/gengo v0.0.0-20190813173942-955ffa8fcfc9/go.mod h1:ezvh/TsK7cY6rbqRK0oQQ8IAqLxYwwyPxAX1Pzy0ii0=
 k8s.io/klog v0.0.0-20181102134211-b9b56d5dfc92/go.mod h1:Gq+BEi5rUBO/HRz0bTSXDUcqjScdoY3a9IHpCEIOOfk=
 k8s.io/klog v0.3.0/go.mod h1:Gq+BEi5rUBO/HRz0bTSXDUcqjScdoY3a9IHpCEIOOfk=
 k8s.io/klog v0.4.0 h1:lCJCxf/LIowc2IGS9TPjWDyXY4nOmdGdfcwwDQCOURQ=

staging/src/k8s.io/sample-controller/go.sum

@@ -143,6 +143,8 @@ gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 k8s.io/gengo v0.0.0-20190128074634-0689ccc1d7d6 h1:4s3/R4+OYYYUKptXPhZKjQ04WJ6EhQQVFdjOFvCazDk=
 k8s.io/gengo v0.0.0-20190128074634-0689ccc1d7d6/go.mod h1:ezvh/TsK7cY6rbqRK0oQQ8IAqLxYwwyPxAX1Pzy0ii0=
+k8s.io/gengo v0.0.0-20190813173942-955ffa8fcfc9 h1:/gJp8cw8+k4AxBNGZ5u5eRoCOzH3WVpY02K654HNiyU=
+k8s.io/gengo v0.0.0-20190813173942-955ffa8fcfc9/go.mod h1:ezvh/TsK7cY6rbqRK0oQQ8IAqLxYwwyPxAX1Pzy0ii0=
 k8s.io/klog v0.0.0-20181102134211-b9b56d5dfc92/go.mod h1:Gq+BEi5rUBO/HRz0bTSXDUcqjScdoY3a9IHpCEIOOfk=
 k8s.io/klog v0.3.0/go.mod h1:Gq+BEi5rUBO/HRz0bTSXDUcqjScdoY3a9IHpCEIOOfk=
 k8s.io/klog v0.4.0 h1:lCJCxf/LIowc2IGS9TPjWDyXY4nOmdGdfcwwDQCOURQ=

vendor/k8s.io/gengo/examples/deepcopy-gen/generators/deepcopy.go

@@ -718,7 +718,7 @@ func (g *genDeepCopy) doMap(t *types.Type, sw *generator.SnippetWriter) {
 	}
 
 	if !ut.Key.IsAssignable() {
-		klog.Fatalf("Hit an unsupported type %v.", uet)
+		klog.Fatalf("Hit an unsupported type %v for: %v", uet, t)
 	}
 
 	sw.Do("*out = make($.|raw$, len(*in))\n", t)
@@ -745,6 +745,10 @@ func (g *genDeepCopy) doMap(t *types.Type, sw *generator.SnippetWriter) {
 	case uet.IsAssignable():
 		sw.Do("(*out)[key] = val\n", nil)
 	case uet.Kind == types.Interface:
+		// Note: do not generate code that won't compile as `DeepCopyinterface{}()` is not a valid function
+		if uet.Name.Name == "interface{}" {
+			klog.Fatalf("DeepCopy of %q is unsupported. Instead, use named interfaces with DeepCopy<named-interface> as one of the methods.", uet.Name.Name)
+		}
 		sw.Do("if val == nil {(*out)[key]=nil} else {\n", nil)
 		// Note: if t.Elem has been an alias "J" of an interface "I" in Go, we will see it
 		// as kind Interface of name "J" here, i.e. generate val.DeepCopyJ(). The golang
@@ -761,7 +765,7 @@ func (g *genDeepCopy) doMap(t *types.Type, sw *generator.SnippetWriter) {
 	case uet.Kind == types.Struct:
 		sw.Do("(*out)[key] = *val.DeepCopy()\n", uet)
 	default:
-		klog.Fatalf("Hit an unsupported type %v.", uet)
+		klog.Fatalf("Hit an unsupported type %v for %v", uet, t)
 	}
 	sw.Do("}\n", nil)
 }
@@ -793,6 +797,10 @@ func (g *genDeepCopy) doSlice(t *types.Type, sw *generator.SnippetWriter) {
 			g.generateFor(ut.Elem, sw)
 			sw.Do("}\n", nil)
 		} else if uet.Kind == types.Interface {
+			// Note: do not generate code that won't compile as `DeepCopyinterface{}()` is not a valid function
+			if uet.Name.Name == "interface{}" {
+				klog.Fatalf("DeepCopy of %q is unsupported. Instead, use named interfaces with DeepCopy<named-interface> as one of the methods.", uet.Name.Name)
+			}
 			sw.Do("if (*in)[i] != nil {\n", nil)
 			// Note: if t.Elem has been an alias "J" of an interface "I" in Go, we will see it
 			// as kind Interface of name "J" here, i.e. generate val.DeepCopyJ(). The golang
@@ -802,7 +810,7 @@ func (g *genDeepCopy) doSlice(t *types.Type, sw *generator.SnippetWriter) {
 		} else if uet.Kind == types.Struct {
 			sw.Do("(*in)[i].DeepCopyInto(&(*out)[i])\n", nil)
 		} else {
-			klog.Fatalf("Hit an unsupported type %v.", uet)
+			klog.Fatalf("Hit an unsupported type %v for %v", uet, t)
 		}
 		sw.Do("}\n", nil)
 	}
@@ -863,6 +871,10 @@ func (g *genDeepCopy) doStruct(t *types.Type, sw *generator.SnippetWriter) {
 				sw.Do("in.$.name$.DeepCopyInto(&out.$.name$)\n", args)
 			}
 		case uft.Kind == types.Interface:
+			// Note: do not generate code that won't compile as `DeepCopyinterface{}()` is not a valid function
+			if uft.Name.Name == "interface{}" {
+				klog.Fatalf("DeepCopy of %q is unsupported. Instead, use named interfaces with DeepCopy<named-interface> as one of the methods.", uft.Name.Name)
+			}
 			sw.Do("if in.$.name$ != nil {\n", args)
 			// Note: if t.Elem has been an alias "J" of an interface "I" in Go, we will see it
 			// as kind Interface of name "J" here, i.e. generate val.DeepCopyJ(). The golang
@@ -870,7 +882,7 @@ func (g *genDeepCopy) doStruct(t *types.Type, sw *generator.SnippetWriter) {
 			sw.Do(fmt.Sprintf("out.$.name$ = in.$.name$.DeepCopy%s()\n", uft.Name.Name), args)
 			sw.Do("}\n", nil)
 		default:
-			klog.Fatalf("Hit an unsupported type %v.", uft)
+			klog.Fatalf("Hit an unsupported type %v for %v, from %v", uft, ft, t)
 		}
 	}
 }
@@ -907,6 +919,6 @@ func (g *genDeepCopy) doPointer(t *types.Type, sw *generator.SnippetWriter) {
 		sw.Do("*out = new($.Elem|raw$)\n", ut)
 		sw.Do("(*in).DeepCopyInto(*out)\n", nil)
 	default:
-		klog.Fatalf("Hit an unsupported type %v.", uet)
+		klog.Fatalf("Hit an unsupported type %v for %v", uet, t)
 	}
 }

vendor/k8s.io/gengo/examples/set-gen/generators/sets.go

@@ -205,17 +205,19 @@ func $.type|public$KeySet(theMap interface{}) $.type|public$ {
 }
 
 // Insert adds items to the set.
-func (s $.type|public$) Insert(items ...$.type|raw$) {
+func (s $.type|public$) Insert(items ...$.type|raw$) $.type|public$ {
 	for _, item := range items {
 		s[item] = Empty{}
 	}
+	return s
 }
 
 // Delete removes all items from the set.
-func (s $.type|public$) Delete(items ...$.type|raw$) {
+func (s $.type|public$) Delete(items ...$.type|raw$) $.type|public$ {
 	for _, item := range items {
 		delete(s, item)
 	}
+	return s
 }
 
 // Has returns true if and only if item is contained in the set.

vendor/k8s.io/gengo/examples/set-gen/sets/byte.go

@@ -46,17 +46,19 @@ func ByteKeySet(theMap interface{}) Byte {
 }
 
 // Insert adds items to the set.
-func (s Byte) Insert(items ...byte) {
+func (s Byte) Insert(items ...byte) Byte {
 	for _, item := range items {
 		s[item] = Empty{}
 	}
+	return s
 }
 
 // Delete removes all items from the set.
-func (s Byte) Delete(items ...byte) {
+func (s Byte) Delete(items ...byte) Byte {
 	for _, item := range items {
 		delete(s, item)
 	}
+	return s
 }
 
 // Has returns true if and only if item is contained in the set.

vendor/k8s.io/gengo/examples/set-gen/sets/int.go

@@ -46,17 +46,19 @@ func IntKeySet(theMap interface{}) Int {
 }
 
 // Insert adds items to the set.
-func (s Int) Insert(items ...int) {
+func (s Int) Insert(items ...int) Int {
 	for _, item := range items {
 		s[item] = Empty{}
 	}
+	return s
 }
 
 // Delete removes all items from the set.
-func (s Int) Delete(items ...int) {
+func (s Int) Delete(items ...int) Int {
 	for _, item := range items {
 		delete(s, item)
 	}
+	return s
 }
 
 // Has returns true if and only if item is contained in the set.

vendor/k8s.io/gengo/examples/set-gen/sets/int64.go

@@ -46,17 +46,19 @@ func Int64KeySet(theMap interface{}) Int64 {
 }
 
 // Insert adds items to the set.
-func (s Int64) Insert(items ...int64) {
+func (s Int64) Insert(items ...int64) Int64 {
 	for _, item := range items {
 		s[item] = Empty{}
 	}
+	return s
 }
 
 // Delete removes all items from the set.
-func (s Int64) Delete(items ...int64) {
+func (s Int64) Delete(items ...int64) Int64 {
 	for _, item := range items {
 		delete(s, item)
 	}
+	return s
 }
 
 // Has returns true if and only if item is contained in the set.

vendor/k8s.io/gengo/examples/set-gen/sets/string.go

@@ -46,17 +46,19 @@ func StringKeySet(theMap interface{}) String {
 }
 
 // Insert adds items to the set.
-func (s String) Insert(items ...string) {
+func (s String) Insert(items ...string) String {
 	for _, item := range items {
 		s[item] = Empty{}
 	}
+	return s
 }
 
 // Delete removes all items from the set.
-func (s String) Delete(items ...string) {
+func (s String) Delete(items ...string) String {
 	for _, item := range items {
 		delete(s, item)
 	}
+	return s
 }
 
 // Has returns true if and only if item is contained in the set.

vendor/modules.txt

@@ -1582,7 +1582,7 @@ k8s.io/cri-api/pkg/apis/testing
 # k8s.io/csi-translation-lib v0.0.0 => ./staging/src/k8s.io/csi-translation-lib
 k8s.io/csi-translation-lib
 k8s.io/csi-translation-lib/plugins
-# k8s.io/gengo v0.0.0-20190128074634-0689ccc1d7d6 => k8s.io/gengo v0.0.0-20190128074634-0689ccc1d7d6
+# k8s.io/gengo v0.0.0-20190813173942-955ffa8fcfc9 => k8s.io/gengo v0.0.0-20190813173942-955ffa8fcfc9
 k8s.io/gengo/args
 k8s.io/gengo/examples/deepcopy-gen/generators
 k8s.io/gengo/examples/defaulter-gen/generators