*       channel have their own file descriptors. Generally this only happens when both channels
   *       are files or sockets. This performs zero copies - the bytes never enter userspace.
   *   <li>Use mmap(2) or equivalent. Requires that either the input channel or the output channel
   *       have file descriptors. Bytes are copied from the file into a kernel buffer, then directly

        collection = mapEntry.getValue();
        valueIterator = collection.iterator();
      }
      /*
       * uncheckedCastNullableTToT is safe: The first call to this method always enters the !hasNext() case and
       * populates key, after which it's never cleared.
       */
      return output(uncheckedCastNullableTToT(key), valueIterator.next());
    }

    @Override

        collection = mapEntry.getValue();
        valueIterator = collection.iterator();
      }
      /*
       * uncheckedCastNullableTToT is safe: The first call to this method always enters the !hasNext() case and
       * populates key, after which it's never cleared.
       */
      return output(uncheckedCastNullableTToT(key), valueIterator.next());
    }

    @Override

	}

	var wg sync.WaitGroup
	wg.Add(1)
	var errsb strings.Builder
	go func() {
		defer wg.Done()
		io.Copy(&errsb, r)
	}()

	// Give the program a chance to enter the function.
	// If the program doesn't get there the test will still
	// pass, although it doesn't quite test what we intended.
	// This is fine as long as the program normally makes it.
	time.Sleep(time.Millisecond)

//
//go:nosplit
func osPreemptExtEnter(mp *m) {
	for !atomic.Cas(&mp.preemptExtLock, 0, 1) {
		// An asynchronous preemption is in progress. It's not
		// safe to enter external code because it may call
		// ExitProcess and deadlock with SuspendThread.
		// Ideally we would do the preemption ourselves, but
		// can't since there may be untyped syscall arguments

// If preserve=true, don't return it to heap nor relink in mcentral lists;
// caller takes care of it.
func (sl *sweepLocked) sweep(preserve bool) bool {
	// It's critical that we enter this function with preemption disabled,
	// GC must not start while we are in the middle of this function.
	gp := getg()
	if gp.m.locks == 0 && gp.m.mallocing == 0 && gp != gp.m.g0 {
		throw("mspan.sweep: m is not locked")

			sb.SetExternal(true)
		}

		sb.SetSize(int64(sect.size))
		sb.SetAlign(int32(sect.align))
		sb.SetReadOnly(sect.readOnlyMem)

		sect.sym = sb.Sym()
	}

	// enter sub-symbols into symbol table.
	// symbol 0 is the null symbol.
	symbols := make([]loader.Sym, elfobj.nsymtab)

	for i := 1; i < elfobj.nsymtab; i++ {
		var elfsym ElfSym

	return fmt.Sprintf("Name:%s Port:%d Protocol:%v", p.Name, p.Port, p.Protocol)
}

// PortList is a set of ports
type PortList []*Port

// TrafficDirection defines whether traffic exists a service instance or enters a service instance
type TrafficDirection string

const (
	// TrafficDirectionInbound indicates inbound traffic
	TrafficDirectionInbound TrafficDirection = "inbound"

=== Terminating Continuous Build
If Gradle is attached to an interactive input source, such as a terminal, the continuous build can be exited by pressing `CTRL-D` (On Microsoft Windows, it is required to also press `ENTER` or `RETURN` after `CTRL-D`).

If Gradle is not attached to an interactive input source (e.g. is running as part of a script), the build process must be terminated (e.g. using the `kill` command or similar).

```

</div>

!!! info
    There are other formats and tools to define and install package dependencies.

### Create the **FastAPI** Code

* Create an `app` directory and enter it.
* Create an empty file `__init__.py`.
* Create a `main.py` file with:

```Python
from typing import Union

from fastapi import FastAPI

app = FastAPI()


@app.get("/")