*
     * @param is
     *            the input stream (must not be {@literal null})
     * @param encoding
     *            the encoding of the input stream (must not be {@literal null} or empty)
     * @return a {@link Reader} to read from the file
     */
    public static InputStreamReader create(final InputStream is, final String encoding) {
        assertArgumentNotNull("is", is);

     * @return true if this map maps one or more keys to the specified value
     */
    @Override
    public boolean containsValue(final Object value) {
        return parent.containsValue(value);
    }

    /**
     * Returns the value to which the specified key is mapped.
     *
     * @param key the key whose associated value is to be returned

   * independent stream each time it is called.
   *
   * <p>The caller is responsible for ensuring that the returned stream is closed.
   *
   * @throws IOException if an I/O error occurs while opening the stream
   */
  public abstract OutputStream openStream() throws IOException;

  /**
   * Opens a new buffered {@link OutputStream} for writing to this sink. The returned stream is not

   * independent stream each time it is called.
   *
   * <p>The caller is responsible for ensuring that the returned stream is closed.
   *
   * @throws IOException if an I/O error occurs while opening the stream
   */
  public abstract OutputStream openStream() throws IOException;

  /**
   * Opens a new buffered {@link OutputStream} for writing to this sink. The returned stream is not

    @Test
    void testDfsImplConstructor() {
        // The constructor is called in setUp(), so if no exception is thrown, this test passes.
        assertNotNull(dfsImpl);
    }

    // Tests for isTrustedDomain
    @Test
    void testIsTrustedDomain_DfsDisabled() throws SmbAuthException {
        // Scenario: DFS is disabled in the configuration.
        when(mockConfig.isDfsDisabled()).thenReturn(true);

 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * 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.
 */

// Copyright (c) 2015-2021 MinIO, Inc.
//
// This file is part of MinIO Object Storage stack
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful

   * PLAIN_TEXT_UTF_8.is(ANY_TYPE) // true
   * PLAIN_TEXT_UTF_8.is(ANY_TEXT_TYPE) // true
   * PLAIN_TEXT_UTF_8.is(ANY_IMAGE_TYPE) // false
   * PLAIN_TEXT_UTF_8.is(ANY_TEXT_TYPE.withCharset(UTF_8)) // true
   * PLAIN_TEXT_UTF_8.withoutParameters().is(ANY_TEXT_TYPE.withCharset(UTF_8)) // false
   * PLAIN_TEXT_UTF_8.is(ANY_TEXT_TYPE.withCharset(UTF_16)) // false
   * }
   *

      monitor.leave();
    }
  }

  /**
   * Inserts the specified element into this priority queue. As the queue is unbounded this method
   * will never block.
   *
   * @param e the element to add
   * @param timeout This parameter is ignored as the method never blocks
   * @param unit This parameter is ignored as the method never blocks
   * @return {@code true}

{* ../../docs_src/query_params_str_validations/tutorial001_py310.py hl[7] *}

The query parameter `q` is of type `str | None`, that means that it's of type `str` but could also be `None`, and indeed, the default value is `None`, so FastAPI will know it's not required.

/// note

FastAPI will know that the value of `q` is not required because of the default value `= None`.