*   <li>Convert between specific preset values using {@link
 *       com.google.common.collect.Maps#asConverter Maps.asConverter}. For example, use this to
 *       create a "fake" converter for a unit test. It is unnecessary (and confusing) to <i>mock</i>
 *       the {@code Converter} type using a mocking framework.
 *   <li>Pass two lambda expressions or method references to the {@link #from from} factory method.

The same example would then look like:

{* ../../docs_src/dependencies/tutorial004_an_py310.py hl[19] *}

...and **FastAPI** will know what to do.

/// tip

If that seems more confusing than helpful, disregard it, you don't *need* it.

It is just a shortcut. Because **FastAPI** cares about helping you minimize code repetition.

It will have a property `scopes` with a list containing all the scopes required by itself and all the dependencies that use this as a sub-dependency. That means, all the "dependants"... this might sound confusing, it is explained again later below.

The `security_scopes` object (of class `SecurityScopes`) also provides a `scope_str` attribute with a single string, containing those scopes separated by spaces (we are going to use it).

        }
        message += " ";
      }
      if (shouldShowExtraNanos) {
        message += overWaitLeftoverNanos + " nanoseconds ";
      }

      message += "delay)";
    }
    // It's confusing to see a completed future in a timeout message; if isDone() returns false,
    // then we know it must have given a pending toString value earlier. If not, then the future

        }
        message += " ";
      }
      if (shouldShowExtraNanos) {
        message += overWaitLeftoverNanos + " nanoseconds ";
      }

      message += "delay)";
    }
    // It's confusing to see a completed future in a timeout message; if isDone() returns false,
    // then we know it must have given a pending toString value earlier. If not, then the future

        // Read the three data bytes
        assertEquals(1, sis.read());
        assertEquals(2, sis.read());
        assertEquals(3, sis.read());

        // After consuming all data, trying to read again will attempt to read
        // another packet header, but since there's no more data, it will throw IOException
        assertThrows(IOException.class, () -> sis.read());
    }

    @Test

  }

  @Test
  fun trailersWithServerTruncatedResponseHttp2() {
    trailersWithServerTruncatedResponse(Protocol.HTTP_2)
  }

  /**
   * If the server closes the connection while the client is consuming the response body, attempts
   * to peek or read the trailers should throw.
   */
  private fun trailersWithServerTruncatedResponse(protocol: Protocol) {
    val responseBody = "a".repeat(OKHTTP_CLIENT_WINDOW_SIZE)

Using these `dependencies` in the *path operation decorator* you can make sure they are executed while avoiding editor/tooling errors.

It might also help avoid confusion for new developers that see an unused parameter in your code and could think it's unnecessary.

///

/// info

In this example we use invented custom headers `X-Key` and `X-Token`.

        assertNotNull(r2, "Second adapted resource must not be null");
        assertTrue(r2.getName().endsWith("/"), "Name should end with '/'");

        assertFalse(itr.hasNext(), "No more elements after consuming two");
    }

    @ParameterizedTest
    @NullAndEmptySource
    @DisplayName("Invalid names are skipped; next valid is returned")
    void skipsMalformedNames_thenReturnsValid(String badName) throws Exception {

*   For C++ API users: `TensorShape::ShortDebugString` has been renamed to
    `DebugString`, and the previous `DebugString` behavior is gone (it was
    needlessly verbose and produced a confusing empty string for scalars).
*   `GraphOptions.skip_common_subexpression_elimination` has been removed. All
    graph optimizer options are now specified via
    `GraphOptions.OptimizerOptions`.