DefaultSourceLoader is used if none was set (see WithLoader()).

WithGlobalFolders appends the given paths to the registry's list of global folders to search if the requested module is not found elsewhere.

WithLoader sets a function which will be called by the require() function in order to get a source code for a module at the given path.

Registry contains a cache of compiled modules which can be used by multiple Runtimes.

NativeModule is an interface that represents a module with native methods and objects.

SourceLoader represents a function that returns a file data at a given path.