```

But then we get a `dict` in the parameter `commons` of the *path operation function*.

And we know that editors can't provide a lot of support (like completion) for `dict`s, because they can't know their keys and value types.

We can do better...

## What makes a dependency

Up to now you have seen dependencies declared as functions.

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

// initialization cycles

package init0

// initialization cycles (we don't know the types)
const (
	s0 /* ERROR "initialization cycle: s0 refers to itself" */ = s0

	x0 /* ERROR "initialization cycle for x0" */ = y0
	y0 = x0

	a0 = b0
	b0 /* ERROR "initialization cycle for b0" */ = c0

				case isAttr(t):
					pos = key
				case types.IsInterface(t):
					// As we do not do dataflow, we do not know what the dynamic type is.
					// But we might be able to learn enough to make a decision.
					if types.AssignableTo(stringType, t) {
						// t must be an empty interface. So it can also be an Attr.
						// We don't know enough to make an assumption.
						pos = unknown
						continue

    /**
     * Classes to compile are all classes that we know from Java sources that will be compiled.
     * These classes are deleted before a compilation and are not passed to Java compiler (their sources are passed to a compiler).
     * We only need them in {@link CompilationClassBackupService} so we know what files don't need a backup.
     */
    Set<String> getClassesToCompile();

     *   <li>If this field's value is some other thread object, we know that it's not our thread.
     *   <li>If this field's value == null because it originally belonged to another thread and that
     *       thread cleared it, we still know that it's not associated with our thread
     *   <li>If this field's value == null because it was associated with our thread and was
     *       cleared, we know that we're not executing inline any more
     * </ul>

    if (mapEntryBelowToTruncate != null) {
      // we know ( [
      RangeMapEntry<K, V> rangeMapEntry = mapEntryBelowToTruncate.getValue();
      if (rangeMapEntry.getUpperBound().compareTo(rangeToRemove.lowerBound) > 0) {
        // we know ( [ )
        if (rangeMapEntry.getUpperBound().compareTo(rangeToRemove.upperBound) > 0) {
          // we know ( [ ] ), so insert the range ] ) back into the map --

     *   <li>If this field's value is some other thread object, we know that it's not our thread.
     *   <li>If this field's value == null because it originally belonged to another thread and that
     *       thread cleared it, we still know that it's not associated with our thread
     *   <li>If this field's value == null because it was associated with our thread and was
     *       cleared, we know that we're not executing inline any more
     * </ul>

    ```

!!! info
    Notice that we are only declaring one dependency in the *path operation function*, the `query_or_cookie_extractor`.

    But **FastAPI** will know that it has to solve `query_extractor` first, to pass the results of that to `query_or_cookie_extractor` while calling it.

```mermaid
graph TB

query_extractor(["query_extractor"])

// just nice to know that it compiles.
void* create(TF_OpKernelConstruction* ctx) {
  TF_DataType type;
  TF_Status* s = TF_NewStatus();
  TF_OpKernelConstruction_GetAttrType(ctx, "foobar", &type, s);
  TF_DeleteStatus(s);
  return NULL;
}

// A compute function. This will never actually get called in this test, it's
// just nice to know that it compiles.

        // TODO: this is an approximation as we know swift currently supports only 64-bit runtimes - eventually, we'll want to query for this
        if (!isCurrentArchitecture(targetPlatform)) {
            return new UnsupportedPlatformToolProvider(targetPlatform.getOperatingSystem(), String.format("Don't know how to build for %s.", targetPlatform.getDisplayName()));
        }