storageRESTMethodCleanAbandoned = "/cln"
	storageRESTMethodDeleteBulk     = "/dblk"
	storageRESTMethodReadParts      = "/rps"
)

const (
	storageRESTVolume           = "vol"
	storageRESTVolumes          = "vols"
	storageRESTDirPath          = "dpath"
	storageRESTFilePath         = "fp"
	storageRESTVersionID        = "vid"
	storageRESTHealing          = "heal"
	storageRESTTotalVersions    = "tvers"

		for _, vers := range versions {
			if len(vers) == 0 {
				consistent = false
				continue
			}
			ver := vers[0]
			if len(tops) == 0 {
				consistent = true
				topSig = ver.header
			} else {
				consistent = consistent && ver.header == topSig
			}
			tops = append(tops, vers[0])
		}

		// Check if done...

			// clone with new statement
			tx.Statement = &Statement{
				DB:        tx,
				ConnPool:  db.Statement.ConnPool,
				Context:   db.Statement.Context,
				Clauses:   map[string]clause.Clause{},
				Vars:      make([]interface{}, 0, 8),
				SkipHooks: db.Statement.SkipHooks,
			}
			if db.Config.PropagateUnscoped {
				tx.Statement.Unscoped = db.Statement.Unscoped
			}
		} else {
			// with clone statement

// present or if one configuration is incomplete.
func IsPresent() (bool, error) {
	// isPresent reports whether at least one of the
	// given env. variables is present.
	isPresent := func(vars ...string) bool {
		for _, v := range vars {
			if _, ok := os.LookupEnv(v); ok {
				return ok
			}
		}
		return false
	}

	// First, check which KMS/KES env. variables are present.

                      _CONTRIB_WARNING)
# The templated code that replaces the placeholder above sometimes
# sets the __all__ variable. If it does, we have to be sure to add
# "contrib".
if "__all__" in vars():
  vars()["__all__"].append("contrib")

from tensorflow.python.platform import flags
# The "app" module will be imported as part of the placeholder section above.

  AUTH_HEADER="Authorization: Bearer $(gcloud auth print-access-token)"
  export AUTH_HEADER
fi

SIDECAR="${SIDECAR:-envoy}"

# OS-neutral vars. These currently only work for linux.
ISTIO_ENVOY_VERSION="${ISTIO_ENVOY_VERSION:-${PROXY_REPO_SHA}}"

👈 🛃 © 🎚 💪 🚮 <a href="https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers" class="external-link" target="_blank">⚙️ '✖-' 🔡</a>.

✋️ 🚥 👆 ✔️ 🛃 🎚 👈 👆 💚 👩‍💻 🖥 💪 👀, 👆 💪 🚮 👫 👆 ⚜ 📳 (✍ 🌅 [⚜ (✖️-🇨🇳 ℹ 🤝)](../tutorial/cors.md){.internal-link target=_blank}), ⚙️ 🔢 `expose_headers` 📄 <a href="https://www.starlette.io/middleware/#corsmiddleware" class="external-link" target="_blank">💃 ⚜ 🩺</a>....

    @BeforeClass
    public static void beforeClass() throws Exception {
        runner = new OpenSearchRunner();
        runner.onBuild((number, settingsBuilder) -> {
            settingsBuilder.put("http.cors.enabled", true);
            settingsBuilder.put("discovery.type", "single-node");
            // settingsBuilder.putList("discovery.seed_hosts", "127.0.0.1:9301");

@REM ----------------------------------------------------------------------------
@REM Apache Maven Wrapper startup batch script, version 3.3.2
@REM
@REM Required ENV vars:
@REM JAVA_HOME - location of a JDK home dir
@REM
@REM Optional ENV vars
@REM MAVEN_BATCH_ECHO - set to 'on' to enable the echoing of the batch commands
@REM MAVEN_BATCH_PAUSE - set to 'on' to wait for a keystroke before ending

Environment variables could be useful for handling application **settings**, as part of the **installation** of Python, etc.

## Create and Use Env Vars

You can **create** and use environment variables in the **shell (terminal)**, without needing Python:

//// tab | Linux, macOS, Windows Bash

<div class="termy">

```console