php-client-initializationlisted

# Initializing an APIMatic-generated PHP SDK client Replace the `{...}` placeholders below with the real names from your SDK's source: - `{Client}` — the client class in `src/`, e.g. `src/AcmeClient.php`. Its builder is `{Client}Builder`. - `{Group}` — an API group; the client exposes one memoized accessor per group, `get{Group}{Postfix}()`. - `{Postfix}` — the accessor/class suffix, which is named per SDK. It is `Controller` unless this one renamed it (`Api`, `Client`, …), and that one name covers the folder, the classes and the client getters together — `ls src/` and read the accessor names off `src/{Client}.php` before writing one. An API split across multiple namespaces generates **one client class per namespace**, so `ls src/*.php` rather than assuming a single client. Substitute these before running anything: `use PaypalServerSdkLib\{Client}Builder;` left as written is a PHP **parse error**, since `\{…}` after a namespace is group-use syntax rather than an identifier. ## The shape: a builder, not a constructor ```php use PaypalServerSdkLib\{Client}Builder; use PaypalServerSdkLib\Environment; $client = {Client}Builder::init() ->environment(Environment::{CONSTANT}) ->timeout(30) // SECONDS, not milliseconds // credentials — see php-authentication ->build(); ``` `{Client}Builder::init()` is a static factory (the constructor is private). Every setter returns `$this`, and `build()` hands the accumulated config array to the cl