Check for a minimum number of arguments. This must be used if using TO_ARG
Shorthand for validating a this object as a native type
Uses .init value of a variable if argument doesn't exist. Arguments length MUST be checked first
Shorthand for extracting an argument without validating its type
Get an optional argument and default value
Contains functions to mixin to simplify code reuse. For these to work, the parameters of a native function must be called context, thisObj, args, and nfe.