*/
function computeStatistics(groupedFiles, fileMetadatas) {
    let totalAdditions = 0;
    let totalDeletions = 0
    let totalChangedFiles = 0;

    let summaries = [...groupedFiles.values()];
    Object.values(summaries).forEach(summary => {
        summary.additions = 0;
        summary.deletions = 0;

        summary.files.forEach(file => {
            let fileMetadata = metadataFor(fileMetadatas, file);

            .accept(query.visitor, null)
            ?: query.defaultValue


    fun <T : Any?> executeQuery(apiSourceFile: ApiSourceFile.Kotlin, transform: (KtFile) -> T): T =
        apiSourceFile.normalizedPath.let { sourceNormalizedPath ->
            openKotlinCompilationUnitsByRoot
                .computeIfAbsent(apiSourceFile.currentSourceRoot) {
                    KotlinSourceParser().parseSourceRoots(

## Let's Encrypt

Antes de Let's Encrypt, esses certificados HTTPS eram vendidos por terceiros confiáveis.

O processo de aquisição de um desses certificados costumava ser complicado, exigia bastante papelada e os certificados eram bastante caros.

Mas então <a href="https://letsencrypt.org/" class="external-link" target="_blank">Let's Encrypt</a> foi criado.

        // psiBased
        (symbol.psi?.containingFile as? KtFile)?.let { ktFile ->
            with(analysisSession) {
                return ktFile.getFileSymbol()
            }
        }
        // descriptorBased
        val descriptor = symbol.containingSymbolOrSelf.getDescriptor()
        val ktFile = descriptor?.let(DescriptorToSourceUtils::getContainingFile) ?: return null
        with(analysisSession) {

## Use Case

Let's start with an example **use case** and then see how to solve it with this.

Let's imagine that you have some **machine learning models** that you want to use to handle requests. 🤖

The same models are shared among requests, so, it's not one model per request, or one per user or something similar.

    pass


@app.post("/invoices/", callbacks=invoices_callback_router.routes)
def create_invoice(invoice: Invoice, callback_url: Union[HttpUrl, None] = None):
    """
    Create an invoice.

    This will (let's imagine) let the API user (some external developer) create an
    invoice.

    And this path operation will:

    * Send the invoice to the client.
    * Collect the money from the client.

        buildList {
            firScope.simpleImports.values.forEach { imports ->
                imports.forEach { import ->
                    val importedClassId = import.importedName?.let { importedName ->
                        val importedClassId =
                            import.resolvedParentClassId?.createNestedClassId(importedName) ?: ClassId(import.packageFqName, importedName)

## Let's Encrypt

Avant Let's Encrypt, ces certificats HTTPS étaient vendus par des tiers de confiance.

Le processus d'acquisition d'un de ces certificats était auparavant lourd, nécessitait pas mal de paperasses et les certificats étaient assez chers.

Mais ensuite, <a href="https://letsencrypt.org/" class="external-link" target="_blank">Let's Encrypt</a> a été créé.

    System.setErr(object : PrintStream(OutputStream.nullOutputStream()) {})
  }

  fun uninstall() {
    originalSystemOut.let {
      System.setOut(it)
    }
    originalSystemErr.let {
      System.setErr(it)
    }
  }

## Testing: extended example

Now let's extend this example and add more details to see how to test different parts.

### Extended **FastAPI** app file

Let's continue with the same file structure as before:

```
.
├── app
│   ├── __init__.py
│   ├── main.py
│   └── test_main.py
```