How to check blockstates?

With Mcreator update and plugin creations, there are many new possibilities like manipulate blockstates. Unfortunately, that is a “new” resource, as those who do not yet have a certain domain of use do not know how to proceed. While there are other threads on the subject, they are not clear or specific enough, and several are already out of date. So I would like to know, how do I do a blockstate check, using Mcreator 2022.1 with Blockstate procedures 1.2.0?