package openapi3 import (	"testing"	"github.com/stretchr/testify/require" ) func TestIssueXXX(t *testing.T) {	spec := ` openapi: 3.0.0 components: schemas: NullableString: type: string nullable: true NullableRef: $ref: "#/components/schemas/String" nullable: true String: type: string `	sl := NewLoader()	doc, err := sl.LoadFromData([]byte(spec))	require.NoError(t, err)	require.False(t, doc.Components.Schemas["String"].Value.Nullable)	require.True(t, doc.Components.Schemas["NullableString"].Value.Nullable)	require.True(t, doc.Components.Schemas["NullableRef"].Value.Nullable) // this fails! }