borderLeftWidth,\n    width: childrenRect.width,\n    height: childrenRect.height,\n  });\n  offsets.marginTop = 0;\n  offsets.marginLeft = 0;\n\n  // Subtract margins of documentElement in case it's being used as parent\n  // we do this only on HTML because it's the only element that behaves\n  // differently when margins are applied to it. The margins are included in\n  // the box of the documentElement, in the other cases not.\n  if (!isIE10 && isHTML) {\n    const marginTop = parseFloat(styles.marginTop);\n...

          // If setFuture fails or set on the future fails then it must be because that future was
          // cancelled
          assertTrue(setFuture.isCancelled());
          assertTrue(setFuture.wasInterrupted()); // we only call cancel(true)
        }
      } else {
        // set on the future completed
        assertFalse(cancellationSuccess.get());
        assertTrue(setFutureSetSuccess.get());

        super(url, tc);
        this.pipeType = pipeType;
        setNonPooled(unshared);
        if ( !getLocator().isIPC() ) {
            throw new MalformedURLException("Named pipes are only valid on IPC$");
        }
        this.fileLocator.updateType(TYPE_NAMED_PIPE);
    }


    /**
     * Open the Named Pipe resource specified by the url

import java.util.Properties;
import java.util.StringTokenizer;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import jcifs.context.SingletonContext;


/**
 * This class now contains only utilities for config parsing.
 * 
 * We strongly suggest that you create an explicit {@link jcifs.context.CIFSContextWrapper}
 * with your desired config. It's base implementation {@link jcifs.context.BaseContext}

    /**
     * Returns the last component of the target URL. This will
     * effectively be the name of the file or directory represented by this
     * <code>SmbFile</code> or in the case of URLs that only specify a server
     * or workgroup, the server or workgroup will be returned. The name of
     * the root URL <code>smb://</code> is also <code>smb://</code>. If this

            } else {
    
                /* On NT without Unicode the fileNameLength
                 * includes the '\0' whereas on win98 it doesn't. I
                 * guess most clients only support non-unicode so
                 * they don't run into this.
                 */
    
    /* UPDATE: Maybe not! Could this be a Unicode alignment issue. I hope

 * used.
 * <p>
 * Read <a href="../../../ntlmhttpauth.html">jCIFS NTLM HTTP Authentication and the Network Explorer Servlet</a> related
 * information.
 * 
 * @deprecated NTLMv1 only
 */
@Deprecated
public abstract class NtlmServlet extends HttpServlet {

    /**
     * 
     */
    private static final long serialVersionUID = -4686770199446333333L;

    private String defaultDomain;

                                    bat "${cmd}"
                                }
                            }
                        } finally {
                            // in ITs test we need only reports from test itself
                            // test projects can contain reports with tested failed builds

It is imported/included directly into FastAPI so that you can import it from `fastapi` and avoid accidentally importing the alternative `BackgroundTask` (without the `s` at the end) from `starlette.background`.

By only using `BackgroundTasks` (and not `BackgroundTask`), it's then possible to use it as a *path operation function* parameter and have **FastAPI** handle the rest for you, just like when using the `Request` object directly.

```Python hl_lines="8  10"
{!> ../../docs_src/query_params/tutorial004.py!}
```

////

## Required query parameters

When you declare a default value for non-path parameters (for now, we have only seen query parameters), then it is not required.

If you don't want to add a specific value but just make it optional, set the default as `None`.