"make minField valid, ratcheting old value for maxField",
					myCRDV1Beta1, myCRDInstanceName, map[string]interface{}{
						"minField":   "valuelength13",
						"maxField":   "valueThatsVeryLongSee",
						"otherField": "otherValue",
					}},
				applyPatchOperation{
					"make maxField shorter",
					myCRDV1Beta1, myCRDInstanceName, map[string]interface{}{
						"maxField": "l2",
					}},
				expectError{

				stringField: foo
				mapField:
					foo: notbaz
					mapField:
						bar: notbaz
			`),
			newObj: mustUnstructured(`
				stringField: foo
				mapField:
					foo: notbaz
					mapField:
						bar: notbaz
			`),
			warnings: []string{
				`root.mapField.foo: Invalid value: "string": gotta be baz`,
				`root.mapField.mapField.bar: Invalid value: "string": gotta be nested baz`,

	return &structValue{
		Fields:   []*Field{},
		fieldMap: map[string]*Field{},
	}
}

type structValue struct {
	Fields   []*Field
	fieldMap map[string]*Field
}

// AddField appends a MapField to the MapValue and indexes the field by name.
func (sv *structValue) AddField(field *Field) {
	sv.Fields = append(sv.Fields, field)
	sv.fieldMap[field.Name] = field
}