EWorldEditor definition

EWorldEditor is used throughout the script coding to address the World Editor C++ object, but I can't seem to be able to find the mapping EWorldEditor => class WorldEditor. There should be a datablock or object creator with this name, or a class export of some kind in the engine and I can't find it. I need to draw the heightmap quad grid of the world editor, and one idea was to extend the world editor class to add the new functionalities needed, but I need to change the parent type of the EWorldEditor object for this to make any difference.

Another option is to modify the WorldEditor class and whatnot, but the other way seems possible, cleaner, and more object-oriendedish