PHP 8.4 - Implicit Nullable Parameters for Google Analytics

Problem/Motivation

PHP 8.4 introduces stricter rules for implicitly nullable parameters. Any parameter that defaults to
NULL must now be explicitly declared as ?Type.

The Google Analytics module still contains several create() factory methods in migrate process
plugins using:

MigrationInterface $migration = NULL

Under PHP 8.4, this triggers deprecation notices such as:

Deprecated: Implicitly nullable parameter $migration; use ?MigrationInterface instead

This needs to be updated to maintain compatibility with PHP 8.4, Drupal 10.6, and Drupal 11.3.

Steps to reproduce

• Use Google Analytics module on PHP 8.4.
• Run migrations that invoke the following plugins:
  • GoogleAnalyticsParameterPages
  • GoogleAnalyticsVisibilityPages
  • GoogleAnalyticsVisibilityRoles
• Observe PHP 8.4 deprecation warnings.

Proposed resolution

Update all affected create() methods to explicitly declare nullable parameters:

Remaining tasks

User interface changes

API changes

Data model changes