OnFILECreated

I tried to use this OnFILECreated method so I changed from

        partial void OnBRALKCreated(Bezra.Models.BEZRA.BRALK item);

to this

partial void OnBRALKCreated(Bezra.Models.BEZRA.BRALK item)
{
       // Some code
}

and received following error.
|Error|CS0759|No defining declaration found for implementing declaration of partial method 'BEZRAService.OnBRALKCreated(BRALK)'|Bezra|E:\RadzenApp\Bezra\Services\BEZRAService.cs|295|Active||

Sorry for my ignorance but could I find some examples of the usage of this code placeholders.

Partial methods can be implemented in a separate partial class/file:

There are various examples in our documentation also:

Thank you for input, Vladimir