typescript-client-initializationlisted

# Initializing an APIMatic-generated TypeScript SDK client Package and type names below are concrete for this SDK; replace the remaining `{...}` placeholders with the real names from its source: - `{Controller}` — a controller class exported from the package root. Its postfix (`Api`, `Controller`, …) is the SDK's controller-naming setting, fixed at generation time; read the real `export class` names in `src/controllers/` rather than assuming either. ## The shape: one options object, no builder The SDK exports a single `Client` class. You construct it with **one options object**, a `Partial<Configuration>` — every field is optional and missing fields fall back to `DEFAULT_CONFIGURATION`: ```ts import { Client, Environment } from 'paypal-server-sdklib'; const client = new Client({ environment: Environment.{Name}, // auth credential objects — see typescript-authentication timeout: 30000, // ms; 0 disables the timeout httpClientOptions: { // retries, proxy, agents — see typescript-configuration-resilience // ... }, }); ``` There is **no** separate options class or builder — the `Configuration` interface *is* the constructor argument. Open `src/configuration.ts` for the exact field set; it varies per API but always includes `timeout`, `environment`, `httpClientOptions`, plus the credential objects for the schemes the API uses (and any server parameters such as `port`). `src/defaultConfiguration.ts` holds `DEFAULT_CONFIGURATION`