FBlueprintActionDatabase::GetAllActions

Will populate the database first if it hasn't been created yet, and then returns it in its entirety.

Each node spawner is categorized by a class orasset. A spawner that corresponds to a specific class field (like a function, property, enum, etc.) will be listed under that field's class owner. Remaining spawners that can't be categorized this way will be registered by asset or node type.