Trap Packages

Wrap `require` in a try/catch block.

If a function does not throw, return the function return value; otherwise, return the return value of a second function.

Parse a string as JSON.

If a function does not return an error, invoke a callback with the function result; otherwise, invoke a callback with a value `y`.

If a function does not return an error, invoke a callback with the function result; otherwise, invoke a second function.