# - Meshes will have their telemetry aggregated in one place
    # - Meshes will be federated together
    # - Policy will be written referencing one mesh from the other
    #
    # If an administrator expects that any of these conditions may become true in
    # the future, they should ensure their meshes have different Mesh IDs
    # assigned.
    #
    # Within a multicluster mesh, each cluster must be (manually or auto)

	// of request with any HTTP level values required to complete the request half of
	// an upgrade on the server. It does not get a chance to see the response and
	// should bypass any request side logic that expects to see the response.
	WrapRequest(*http.Request) (*http.Request, error)
}

// UpgradeAwareHandler is a handler for proxy requests that may require an upgrade
type UpgradeAwareHandler struct {

**FastAPI** is all based on these type hints, they give it many advantages and benefits.

But even if you never use **FastAPI**, you would benefit from learning a bit about them.

!!! note
    If you are a Python expert, and you already know everything about type hints, skip to the next chapter.

## Motivation

Let's start with a simple example:

```Python
{!../../../docs_src/python_types/tutorial001.py!}
```

    # - Meshes will have their telemetry aggregated in one place
    # - Meshes will be federated together
    # - Policy will be written referencing one mesh from the other
    #
    # If an administrator expects that any of these conditions may become true in
    # the future, they should ensure their meshes have different Mesh IDs
    # assigned.
    #
    # Within a multicluster mesh, each cluster must be (manually or auto)

          f'Got type: {type(sample)} instead.'
      )

    if set(sample.keys()) != expected_input_keys:
      raise KeyError(
          'Invalid input keys for representative sample. The function expects '
          f'input keys of: {set(expected_input_keys)}. '
          f'Got: {set(sample.keys())}. Please provide correct input keys for '
          'representative samples.'
      )

    return sample

 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.gradle.test.fixtures

import org.gradle.internal.concurrent.ExecutorFactory

	VersionID            string    // Specifies the versionID which needs to be overwritten or read
	MTime                time.Time // Is only set in POST/PUT operations
	Expires              time.Time // Is only used in POST/PUT operations

	DeleteMarker            bool // Is only set in DELETE operations for delete marker replication

import static org.gradle.internal.Cast.uncheckedNonnullCast;

@SuppressWarnings("join_with_collect")
public abstract class CollectionUtils {

    /**
     * Returns null if the collection is empty otherwise expects a {@link #single(Iterable)} element to be found.
     */
    @Nullable
    public static <T> T findSingle(Iterable<T> source) {
        return Iterables.isEmpty(source) ? null : single(source);
    }

    /**

// the caller should pass the argument frame type as stackArgsType so that
// reflectcall can execute appropriate write barriers during the copy.
//
// reflectcall expects regArgs.ReturnIsPtr to be populated indicating which
// registers on the return path will contain Go pointers. It will then store
// these pointers in regArgs.Ptrs such that they are visible to the GC.
//

// license that can be found in the LICENSE file.

package runtime

import (
	"internal/abi"
	"internal/runtime/atomic"
	"unsafe"
)

// The X versions of syscall expect the libc call to return a 64-bit result.
// Otherwise (the non-X version) expects a 32-bit result.
// This distinction is required because an error is indicated by returning -1,
// and we need to know whether to check 32 or 64 bits of the result.