* supported. Null keys and values are supported.
 *
 * <p>{@code containsKey(k)}, {@code put(k, v)} and {@code remove(k)} are all (expected and
 * amortized) constant time operations. Expected in the hashtable sense (depends on the hash
 * function doing a good job of distributing the elements to the buckets to a distribution not far

For example, [you can use `with` to read a file](https://docs.python.org/3/tutorial/inputoutput.html#reading-and-writing-files):

```Python
with open("./somefile.txt") as f:
    contents = f.read()
    print(contents)
```

Underneath, the `open("./somefile.txt")` creates an object that is called a "Context Manager".

When the `with` block finishes, it makes sure to close the file, even if there were exceptions.

import java.util.List;
import java.util.NoSuchElementException;
import java.util.Set;
import java.util.stream.Collector;
import org.jspecify.annotations.Nullable;

/**
 * A {@link RangeSet} whose contents will never change, with many other important properties
 * detailed at {@link ImmutableCollection}.
 *
 * @author Louis Wasserman
 * @since 14.0
 */

   * is merely copied. Only as the power set is iterated are the individual subsets created, and
   * these subsets themselves occupy only a small constant amount of memory.
   *
   * @param set the set of elements to construct a power set from
   * @return the power set, as an immutable set of immutable sets

        assertNotNull(netShareEnum);
        assertEquals("\\PIPE\\LANMAN", getFieldValue(netShareEnum, "name"));
        verify(mockConfig).getTransactionBufferSize();
    }

    @Test
    @DisplayName("Test DESCR constant value")
    void testDescrConstant() throws Exception {
        Field descrField = NetShareEnum.class.getDeclaredField("DESCR");
        descrField.setAccessible(true);
        String descr = (String) descrField.get(null);

    /**
     * Enhanced listFiles method that uses directory leasing for caching when available
     *
     * @param smbFile the SmbFile directory to list
     * @return array of SmbFile objects representing the directory contents
     * @throws SmbException if an error occurs
     */
    public static SmbFile[] listFilesWithLeasing(SmbFile smbFile) throws SmbException {
        if (!smbFile.isDirectory()) {

Например, [можно использовать `with` для чтения файла](https://docs.python.org/3/tutorial/inputoutput.html#reading-and-writing-files):

```Python
with open("./somefile.txt") as f:
    contents = f.read()
    print(contents)
```

Под капотом вызов `open("./somefile.txt")` создаёт объект, называемый «контекстным менеджером».

Когда блок `with` завершается, он обязательно закрывает файл, даже если были исключения.

// Code generated by "stringer -type=APIErrorCode -trimprefix=Err api-errors.go"; DO NOT EDIT.

package cmd

import "strconv"

func _() {
	// An "invalid array index" compiler error signifies that the constant values have changed.
	// Re-run the stringer command to generate them again.
	var x [1]struct{}
	_ = x[ErrNone-0]
	_ = x[ErrAccessDenied-1]
	_ = x[ErrBadDigest-2]
	_ = x[ErrEntityTooSmall-3]
	_ = x[ErrEntityTooLarge-4]

In this example, we are simulating a file with `io.BytesIO`, which is a file-like object that lives only in memory, but lets us use the same interface.

For example, we can iterate over it to consume its contents, as we could with a file.

{* ../../docs_src/stream_data/tutorial002_py310.py ln[1:27] hl[3,12:13,25] *}

/// note | Technical Details

import java.io.UncheckedIOException;
import java.util.Arrays;
import java.util.List;
import java.util.Locale;
import java.util.Objects;
import java.util.stream.Collectors;

/**
 * This class models the contents of a changelog YAML file. We validate it using a
 * JSON Schema, as well as some programmatic checks in {@link ValidateChangelogEntryTask}.
 * <ul>
 *   <li><code>buildSrc/src/main/resources/changelog-schema.json</code></li>