[Bug] "No options were set" warning when Google Maps API is loaded externally

[celescript]

Description

When the Google Maps JS API is loaded externally (e.g. via a separate script loader) before APIProvider mounts, APIProvider's effect detects window.google.maps.importLibrary already exists and takes the early-exit path, correctly skipping its own script load. However, it returns without ever calling setOptions(), so setOptionsWasCalled_ remains false. Every subsequent call to the internal importLibrary wrapper then fires the dev warning.

So the suggestion "use a single loader / remove the external script tag" is a valid workaround, but the actual bug is that vis.gl warns about a situation it intentionally supports and handles correctly.

Steps to Reproduce

1. Load the Maps JS API via any external mechanism before APIProvider mounts (e.g. a legacy useGoogleMaps hook that injects a <script> tag)
2. Render APIProvider with a valid apiKey
3. Use useMapsLibrary in any child component
4. Observe the warning in the browser console (dev mode only)

Environment

• Library version: @vis.gl/react-google-maps@1.8.3
• Google maps version: weekly
• Browser and Version: Chrome Version 147.0.7727.116
• OS: macOS 15.7.4

Logs

[@googlemaps/js-api-loader] No options were set before calling importLibrary. Make sure to configure the loader using setOptions().