* is computed from the monotonic duration since system start to ensure consistency
 * between time measurements.
 * <p>
 * This implementation is singleton-based and always uses UTC timezone. The clock
 * cannot be adjusted to different timezones to maintain consistent monotonic behavior.
 * Users needing local time representation should convert the result of {@link #instant()}
 * to their desired timezone:

            // which was set when the class was loaded
            TimeZone providedTimeZone = provider.provide();
            assertNotNull(providedTimeZone);
            // The provider uses the static centralTimeZone which captures the original default
            assertEquals(originalDefault, providedTimeZone);
        } finally {
            // Restore original timezone

# Body - Multiple Parameters { #body-multiple-parameters }

Now that we have seen how to use `Path` and `Query`, let's see more advanced uses of request body declarations.

## Mix `Path`, `Query` and body parameters { #mix-path-query-and-body-parameters }

First, of course, you can mix `Path`, `Query` and request body parameter declarations freely and **FastAPI** will know what to do.

   * penalty of applying the batches is spread across threads so that the amortized cost is slightly
   * higher than performing just the operation without enforcing the capacity constraint.
   *
   * This implementation uses a per-segment queue to record a memento of the additions, removals,
   * and accesses that were performed on the map. The queue is drained on writes and when it exceeds
   * its capacity threshold.
   *

data.placement\n  );\n\n  data.offsets.popper.position = this.options.positionFixed\n    ? 'fixed'\n    : 'absolute';\n\n  // run the modifiers\n  data = runModifiers(this.modifiers, data);\n\n  // the first `update` will call `onCreate` callback\n  // the other ones will call `onUpdate` callback\n  if (!this.state.isCreated) {\n    this.state.isCreated = true;\n    this.options.onCreate(data);\n  } else {\n    this.options.onUpdate(data);\n  }\n}\n","/**\n * Helper used to know if the given modifier is enabled.\n...

 *  Fix: Don't crash if a TLS tunnel's response body is truncated.
 *  Fix: Don't track unusable routes beyond their usefulness. We had a bug where we could track
    certain bad routes indefinitely; now we only track the ones that could be necessary.
 *  Fix: Defer proxy selection until a proxy is required. This saves calls to `ProxySelector` on
    calls that use a pooled connection.


## Version 4.3.1

_2020-01-07_

///

## Activate the Virtual Environment { #activate-the-virtual-environment }

Activate the new virtual environment so that any Python command you run or package you install uses it.

/// tip

Do this **every time** you start a **new terminal session** to work on the project.

///

//// tab | Linux, macOS

<div class="termy">

```console

set_java_home() {
  # For Cygwin and MinGW, ensure paths are in Unix format before anything is touched
  if [ -n "${JAVA_HOME-}" ]; then
    if [ -x "$JAVA_HOME/jre/sh/java" ]; then
      # IBM's JDK on AIX uses strange locations for the executables
      JAVACMD="$JAVA_HOME/jre/sh/java"
      JAVACCMD="$JAVA_HOME/jre/sh/javac"
    else
      JAVACMD="$JAVA_HOME/bin/java"
      JAVACCMD="$JAVA_HOME/bin/javac"

        }
    }

    // --- Server-side copy path (SMB2 + same tree) for zero-length files ---

    @Test
    @DisplayName("copyFile uses server-side copy for zero-length and returns")
    void copyFile_serverSide_zeroLength_happyPath() throws Exception {
        // Arrange
        SmbFile src = mock(SmbFile.class);
        SmbFile dest = mock(SmbFile.class);

		ConditionValues: getConditionValues(r, "", cred),
		IsOwner:         owner,
		Claims:          cred.Claims,
		BucketName:      resource, // overloading BucketName as that's what the policy engine uses to assemble a Resource.
	})