overrideForAll method
Makes duckdb.dart
use the OpenLibrary function for all Dart platforms.
If this method has been called, it takes precedence over overrideFor.
This method must be called before opening any database.
When using the asynchronous API over isolates, open
must be a top-
level function or a static method.
Implementation
void overrideForAll(OpenLibrary open) {
_overriddenForAll = open;
}