Good evening,

To work with Amelia's hooks and filters like amelia_before_cf_added_filter, it's helpful to review the plugin's source code directly, as Amelia’s documentation does not always provide a detailed breakdown of each object’s structure. Here’s what you can do:

1. Explore the Source Code: Navigate to the Amelia plugin folder in your WordPress installation (wp-content/plugins/ameliabooking/). Look for files related to custom fields, particularly under src/Infrastructure/WP/Filters. Here, you can usually find filter definitions and see how the $customField object is constructed and used.

2. Debug the Object: If you need to quickly inspect the $customField object, try logging it using error_log() or var_dump(). For example:

    

   add_filter('amelia_before_cf_added_filter', 'custom_pre_fill_cf', 10, 1); function custom_pre_fill_cf($customField) { error_log(print_r($customField, true)); // Check the properties in the PHP error log return $customField; }

   This way, you can get a list of available properties and methods directly.