As you can see from the documentation, `AsInt64` is a convenience method that either says, I know this is an int, or make it so. There are also ways to check the type before you access, if you prefer. You can even check if its unsigned, if you want that level of type-safety.
Right, but GP is suggesting that the requirement to ignore an 'err' value that would make the API user think twice about possible failure cases that could otherwise go ignored with the convenience API.
You are choosing to use a schema-less, dynamically typed representation (where a strongly typed alternative is directly available). I'd say, the convenience of being able to just say I am going to assume this is an int is fitting. If you wanted to be forced to error check (which needs an if-then in most languages), you might as well use the schema based, strongly typed version of the system instead, which would guarantee correct types for you, and requires no error checking.
