Migrating a dropin

Hello everyone,
I want to migrate a dropin developed for the version 1.3.2 to the 6.1.0 one. Where can i find the informations about the procedure? Where can i find the classes that have been modified between versions? Thanks for your help

You should probably ask this question in the main section of this forum. Also I would not recommend using the dropping mecanism. Use the p2 installation procedure instead, if it’s available depending on which addon you plan to install.