Detecting drag and drop on editor with Python or Editor widgets

Hi! hope you are well.

I would like to create a custom import functionality using the Python API (or ideally with it). I would like for artist to be able to drag and drop from the computer to the content browser, but instead of the current import process (a window for FBX) i would like to prompt my custom routine (including GUI).

I havent found a way to detect drag and drop operations with Python on editor. Is this correct? could you point out any suggestions?