// to check for SSL certificate files. If set this overrides the system default.
	// It is a colon separated list of directories.
	// See https://www.openssl.org/docs/man1.0.2/man1/c_rehash.html.
	certDirEnv = "SSL_CERT_DIR"
)

func (c *Certificate) systemVerify(opts *VerifyOptions) (chains [][]*Certificate, err error) {
	return nil, nil
}

func loadSystemRoots() (*CertPool, error) {

			// Service properly sets SAN. Since it's not external, we do not add the SANs automatically though
			sans: nil,
		},
		{
			name:    "Kubernetes service and EDS ServiceEntry ISTIO_MUTUAL",
			objs:    []runtime.Object{service, pod, endpoint},
			configs: []config.Config{drIstioMTLS, seEDS},
			// The Service has precedence, so its cluster will be used
			sans: []string{"spiffe://cluster.local/ns/default/sa/pod"},

// dot -Tpng src/docs/userguide/img/swift-sourcesets-compilation.dot > src/docs/userguide/img/swift-sourcesets-compilation.png
digraph swiftSourcesetsCompilation {
  graph [ dpi = 100, fontname="Sans"];
  node [fontname = "Sans"];
  edge [fontname = "Sans"];
  node [shape=rectangle, fixedsize=true, width=2.6, height=0.8];

  subgraph firstLine {
    {rank=same swiftCompileVariant implementation variantImplementation}

// dot -Tpng src/docs/userguide/img/xctest-configurations.dot > src/docs/userguide/img/xctest-configurations.png
digraph xctestConfigurations {
  graph [ dpi = 100, fontname="Sans"];
  node [fontname = "Sans"];
  edge [fontname = "Sans"];
  node [shape=rectangle, fixedsize=true, width=3.5, height=0.5];

  subgraph central {
    node[style=filled, fillcolor=white]

digraph swiftLibraryVariantTaskGraph {
  graph [ dpi = 100, fontname="Sans"];
  node [fontname = "Sans"];
  edge [fontname = "Sans"];
  node [shape=rectangle, fixedsize=true, width=2.5, height=0.5];
  node [style="dashed,filled", fillcolor=grey]
  rankdir=LR

// dot -Tpng src/docs/userguide/img/cpp-application-task-graph.dot > src/docs/userguide/img/cpp-application-task-graph.png
digraph cppApplicationTaskGraph {
  graph [ dpi = 100, fontname="Sans"];
  node [fontname = "Sans"];
  edge [fontname = "Sans"];
  node [shape=rectangle, fixedsize=true, width=2.5, height=0.5];
  node [style=filled, fillcolor="#cfe2f3"]
  rankdir=LR

  compileDebugCpp -> linkDebug -> assemble -> build [dir=back]

// dot -Tpng src/docs/userguide/img/cpp-static-library-task-graph.dot > src/docs/userguide/img/cpp-static-library-task-graph.png
digraph cppStaticLibraryTaskGraph {
  graph [ dpi = 100, fontname="Sans"];
  node [fontname = "Sans"];
  edge [fontname = "Sans"];
  node [shape=rectangle, fixedsize=true, width=2.5, height=0.5];
  node [style=filled, fillcolor="#cfe2f3"]
  rankdir=LR

1D5A5         ; mapped                 ; 0066          # 3.1  MATHEMATICAL SANS-SERIF CAPITAL F
1D5A6         ; mapped                 ; 0067          # 3.1  MATHEMATICAL SANS-SERIF CAPITAL G
1D5A7         ; mapped                 ; 0068          # 3.1  MATHEMATICAL SANS-SERIF CAPITAL H
1D5A8         ; mapped                 ; 0069          # 3.1  MATHEMATICAL SANS-SERIF CAPITAL I

digraph javaTestConfigurations {

    rankdir = BT;
    node [fontname="Sans", shape=box, style=filled, fillcolor=chartreuse];
    edge [fontname="Sans"];

    /* tasks */
    compileTestJava [fillcolor=darkslategray1, fontname="Courier New"]
    test [fillcolor=darkslategray1, fontname="Courier New"]

    testCompileClasspath [fillcolor=lightblue]
    testRuntimeClasspath [fillcolor=lightblue]

    /* configurations */

// dot -Tpng src/docs/userguide/img/cpp-sourcesets-compilation.dot > src/docs/userguide/img/cpp-sourcesets-compilation.png
digraph cppSourcesetsCompilation {
  graph [ dpi = 100, fontname="Sans"];
  node [fontname = "Sans"];
  edge [fontname = "Sans"];
  node [shape=rectangle, fixedsize=true, width=2.6, height=0.8];

  subgraph firstLine {
    {rank=same cppCompileVariant implementation variantImplementation}