The base return is the TSQLFragment object, which in turn has a Batches object, which in turn holds… well it can hold a lot of different things. When the text is parsed, it will determine what type of object to return based on the statement it determines it is. For example, if it’s an insert statement it will be a certain type of object with a given set of properties and methods, and if it’s, say, a create index statement you’ll get different properties, such as which table or view is getting the index along with the indexed columns and included columns. It really is interesting.
But interesting can a double-edged sword: since the statement object that gets returned can be different for each parsed piece of code, that means to set up any type of intelligence around the stuff we’re dealing with, we need to check for very specific objects.
Unfortunately, I never got past the first animated GIF, whose subtitle was wrong. You, however, should read the whole thing.