A small tip to find all classes which are registered to a given event - And how I find this tip via SM50

I would like to get a list of all classes which have methods registered to the event NEW_FOCUS of CL_BSP_WD_COLLECTION_WRAPPER.

When I try to use "where used list", I meet with a time out exception. It seems the number of hit are too large.

Also I just would like to get the list of classes which have naming convention for example CL_BSP_WD<XXXX>. However, "where used list" does not allow me to specify any filters.

then I try repository information system in SE80:

Unfortunately it just return the class which defines that event.

I know I can use ST05 to find the transparent table which stores the definition of class method. However there is a more rapid way.

Use tcode SM50, then I found the long-running process for where used list function. It clearly shows that the process is reading on view VSEOCOMPDF.

Have a look at this view in SE11:

Then I try with table SEOCOMPODF:

Then I got the list